The motives on why there is a large coverup if the earth was really flat. The flat earthers haven’t made a plausible motive on why there is such secrecy regarding it.
For instance the 9/11 truthers believe it was NWO order thing, a way to promote continuous war
How about this...it denies God and His handiwork.
We're just an insignificant speck in a vast universe created from nothing.