Eh, I'll take observer reports over a made-up hypothesis.
Then why are your arguing for the Flat-earthists?
More people claim to have seen the Earth from orbit as round than those who claim to have seen evidence of it being flat. But we can't trust them, because they are conspiring, right?
How do we know they arn't telling the truth, and that the Flat-Earthists arn't the actual conspirists, and have brainwashed the lot of you to believing such falsities?
If you say "Because the Earth is flat" you're admitting defeat, as that indicates hiding back to the ideology you so blindly follow, and dare not to test.