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.

Explain the 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 the did in fact isn’t. The explanation for why you can’t see mount Everest from the top of any reasonably high hill anywhere else on earth for example involves throwing out all scientific thinking back to Aristotle and starting again, don’t believe in geometry.