Ok, let me ask this question cause I don't see where it's properly been answered by FE folk.
If there is a plausible answer I'll entertain it.

There are well some 7 other planets out there possibly 8 if they ever find Planet X.
We use telescopes (I have one too) and observe the celestial bodies in the skies.
When looking at Saturn you can see the 4 main rings and they wrap around in a circle.
Ok now lets take Mercury and Venus, skip Mars for a minute.  Go out to Saturn and Jupiter.
When observed through a telescope they appear round, and if you say they are always facing earth I think it would be obvious that's not likely.
Then heck let's look at the moon  our nearest celestial body. 
If you want to argue that anything is flat I think you should use that one.  Since we only get to view one side and only one side.  Due to rotational speed matching the orbit speed of a bit over 27 days.    Are all of the planets 100% of the time directly facing Earth where the universe revolves around the Earth?

I'm not trying to be difficult but I just simply don't understand the logic at play here.