Nope, they don't claim that:
So, no one "proved" that a bumblebee can't fly. What was shown was that a certain simple mathematical model wasn't adequate or appropriate for describing the flight of a bumblebee.
I'll leave it to the reader to ponder the significance of this statement, in the context of the "issues of today".
Is all I know about aerodynamics is that my HS physics book explained very clearly how a curve ball breaks.Of course, the explanation predicts that the spin deflects the path of the ball in exactly the opposite direction to what any fool can see is what actually happens - but that is a mere detail.