This is like saying "people over 8 feet tall don't exist". Why don't you ever see them in your town? Why are they only on TV? Surely its just green screen trickery, right? Why isn't there one in my local zoo? Why can't i meet a giant? ... and the answer is ... people over 8 feet tall are extremely rare. As are alien visits.
It’s nothing like that. I didn’t say I was expecting to see aliens walking down the high street all the time before I believe in them.
I believe in 8 foot tall people because while they are rare, there are very clear photos and film of them, there’s lots of people who have met them and taken photos of them and with them.
I don’t have to have met someone who is 8 feet tall to be pretty sure they exist unless there is some weird “very tall people exist” global conspiracy.
A better comparison is Bigfoot. Why are there only really blurry photos of something which is really hard to identify? If there were Bigfoots or Loch Ness monsters then surely there would be some really clear pictures of footage. I saw a YouTube video recently in which someone said it’s interesting how sightings of the Loch Ness monster have gone down since smartphones were invented, surely you’d now expect clear photos of it everywhere.
If you’re going with visits from aliens are rare then ok, that would explain the absence of clear evidence. But given the lack of clear evidence it’s impossible to confidently say we have aliens visiting us. One other thing I’ll add here is I think you’ll find that the “sightings” of UFOs just happen to coincide with the space race and us being able to launch things into orbit. That surely has to fire everyone’s collective imagination.
I don’t think your belief in the shape of the earth should hang on this although I agree that the existence of aliens does fit better with RE than most FE models where the earth is special and the universe small.
My gut feel is that while aliens may well exist “out there”, the out there is likely to be too far away for us to ever meet them or communicate with them. There is certainly no clear evidence that alien craft routinely visit us, much less interact with us.