How come everything that can disprove flat earth theory, people say is fake?

If you look from space, you can see the earth is round. “Space is fake!!!”
Gravity in general. “Gravity is fake!! You’re just denser then air!”
every experiment proving the earth is flat: “INCORRECTLY DONE!”, “fake!”
Like what?? The entirety of flat earth relies on distrust, all their info “proving” flat earth is just flat out dumb