LD
With due respects, if you have a leaking fuel drain then you do not need to understand bernoullis theorum to figure out that you may loose fuel. A bit of common sense is alot more important in many respects than overdosing on theorums.I agree, that there is negative pressure also below the wing but the point is that it is more negative on top and this can only make one answer. I never said pilots are dumb but that alot of them will learn for the exams and forget the gory details a few months later.
It happens in all walks of life and to suggest that pilots might be different is just arrogamce.