Gatt writes:

I recommend building an airplane sometime. The ultimate way to prove your
theory is to be like the Wright Brothers; build it and fly it.

Folks on this forum have logged hundreds of thousands if not millions of
collective hours and all of them have put their asses on the line based on
the aerodynamic principles in books ...

But they have not built airplanes, as you suggest (with a few rare exceptions,
and even then they did not design them).

About once a month somebody comes in here and wants to talk about how
aerospace science is all wrong but the thing is, none of 'em ever seems to
have flown an airplane.

Flying an airplane wouldn't help, although designing one (successfully) would.