This is because flat earthers don’t understand anything about science or physics or basic common sense and as a result believe the most insane things.

They spend their entire time trying to come up with increasingly convoluted ways that a flat earth could work, rather than just accepting that the simplest explanation is that, in fact, isn’t flat. Their explanation for why you can’t see mount Everest from the top of any reasonably high hill anywhere else on earth, involves throwing out all scientific thinking back to Aristotle and starting again, don’t believe in geometry or infinitely parallel lines.