Sure.
However you specifically asked about Flat Earthers .. and while I won't deny there are some genuine believers in a flat earth out there my experience is that most self described flat earthers with actual university engineering degrees from modern western culture are glorious LARP'ers keeping a straight face and pulling legs.
Much as I believe in a hyperbolic inverted universe within a hollow earth.
I mean, the math checks out, right?
https://inis.iaea.org/search/search.aspx?orig_q=RN:14770298
( Christian engineers are a whole other ball of wax .. but flat earthers that passed kinematics with varying mass from fuel loss to achieve escape velocity ... c'mon now )