If I tried a list of questions like that "against" the Flat Earth, I would be shot down immediately, and told to put only one or two questions in one post!
But, I'll give is a go:
Why does the 'shard' and every other landmark 'Eiffel tower', 'Empire State building' etc look perfectly vertical no matter how far away its viewed from? Never leaning to the left or right.
Because the "lean" in only about 1° in 111 km and even if you saw these buildings at that distance you would never notice 1° of tilt backwards.
Why does water only have the ability to bend in the ocean? Is it down to the 'no laws at sea scenario'? Maybe the laws of physics don't apply at sea? Maybe it's magic water when way out in the middle of the ocean?
As far as we know, the "Laws of Physics" apply everywhere. Some of those "Laws" are Newton's "Laws of Motion" and "Universal Gravitation".
The quick answer to you question is "gravity".
Why don't airplanes have to constantly fly at downward angle to avoid flying out into 'space'? That magic place we call space hahaha. Sorry, it does make me chuckle.
In a sense they do, but not as an "angle", but as a very gradual continuous curve of around 6,380 km, far too slight a curve to be perceptible. But aircraft in "level flight" fly at a constant "pressure altitude" (that is what the altimeter reads) and that is (very nearly) a constant altitude above sea-level.
If I dug vertically down through the 'magic ball (lol)', and descended through it very very slowly, when would I start to turn upside down to join my southern 'hemisphere' cousin?
If you really try to explain all observations, in my opinion, there is far less 'magic' needed to explain everything on the Globe than on the Flat Earth. That is MY opinion.
Sort of, but since it is on average 6,371 km to the centre of the earth and the deepest hole is I think about 12 km deep it is not likely to happen.
But, if we consider the hypothetical case you suggest, "gravity" would fall off roughly linearly with the decreasing distance to the centre,
If the shortest route between 2 points is a straight line, why do 'space ships' turn horizontal? Isn't that a waste of precious 'magic space fuel'?
There is no "magic" about it. Keep all that "magic", because you are going to need it to explain so many simple observation on the Flat Earth
Because these 'space ships' are not "going out into deep space" but into an orbit around the earth, fro which they need around 7.8 km/s or
horizontal velocity.
In fact if you can see them for long enough the seem to curve over so far that they appear to be coming down again, but they are not "coming down", they are simply following the curve of the earth. The altitude readout will show that they are still gaining altitude above a different part of the earth.
Why can I see parts of London from the top of Alexandra palace (also standing perfectly perpendicular to my position, so obviously not to their position) that should be out of sight? Or at least leaning even a minimal amount to one side?
Why would anything "lean to one side"? A Globe is "symmetrical", so the view and distance to the horizon is the same all 360° around.
No tilt would be expected. There would be a slight backward tilt, but at 10 km that would only be about 0.09°, and you would never see that.
Why does a ship that 'vanishes over curvature' become visible again through a telescope?
I do not believe that when "'vanishes over curvature' become visible again through a telescope" and I have seen no convincing evidence.
There are plenty of videos of ships "disappearing" simply because their apparent size becomes too small to see and of course a telescope or a zoom lens will bring them back into view.
Why isn't the 'curvature of the earth' taken into account in surveying and architecture?
It is certainly taken into account by Geodetic Surveyors who survey large tracts of land, up to whole countries and continents.
But surveys for buildings, even large shopping malls, are covering too small an area for the "curvature" to be significant.
Even over 1 km the change in angle is only 0.009° and the deviation from flatness is so small that can only be measured be a vey careful surveyor.
If you bother to check, I think you will find that any surveyor dealing with areas above about 1 km x 1 km would be quite aware of the shape of the globe.
Why isn't the 'spin of the earth' felt?
Firstly, motion in a straight line is not perceptible at all. If you have flown in smooth air at almost 1000 km/hr you will realise that all you notice is a little vibration.
Now the spin of the earth is only 0.0007 rpm. That is about half the rotational speed of the hour hand of an analog clock.
Imagine being on a merry-go-round rotating a one revolution per day - that would be frightfully boring!
Why isn't the 'trajectory of the earth through the so called universe' felt?
Same as the previous answer, except that we are orbiting the sun only once per year!
I feel so sorry for you people who believe what you're told on tv, I really do. I pity you. If you questioned things with an open mind and trusted your own god-given senses would you REALLY believe that? I don't think so. If (God forbid) you had an accident of some kind that left you with amnesia, and for 2 years you couldn't leave your hospital bed and had no recollection of life previous to your accident whatsoever..... I wonder what you would believe if I told you my outlook of the world? If I nursed you through the next 2 years. Then you came out of hospital and everyone was telling you the world is round. It's spinning. I know you can't feel it but it really is. It's also hurtling through the 'universe' at 60000 mph and people in Australia are the other way up. Also, the oceans are curved. Would you believe that, or would you tell them to get a grip and stop talking such nonsense?
If I was in that situation, I hope I would have enough sense to look at all the evidence accumulated over millennia, and not just the tiny bit that I could see with my own eyes.
I would want explanations for:
How the sun and moon appear to rise from behind the horizon and set behind the horizon - that is what it looks like to me.
How the sun and moon appear to stay the same size all day (or night).
What causes the phases of the moon and how everyone sees the same phase.
What causes lunar eclipses.
Then I find that the sun rises in the South East in mid-summer (I live in the Southern Hemisphere), but the Sun path these Flat Earthers tell me about always has the sun to the North of me - not possible.
I might not see a solar eclipse, but presumably, I would read about them and wonder what causes them.
Again, I would read about satellites and wonder whether I could see them, then find that I really could see the ISS.
Yes, it is just possible that I could think the earth flat for a while, then I might go to the beach and wonder why I could see further out to sea to beacons and boats from a higher point about sea-level.
Soon, I would find, as did the ancient "philosophers" that there is so much that a Flat Earth cannot explain.
No need to feel sorry. I feel sorry for
all the wonders of the universe seen by astronomers and the numerous spin-offs of satellite technology.
I find it strange that so many of you can find so many (non-existent) objections to the Globe, but are completely hopeless at explaining so much on the Flat Earth.