Nah. We have a reasonable understanding of fluids. It's just that the two things we say as simple explanations (the plane pushes air downwards causing an equal and opposite reaction to push the plane up; faster flow on top of the wing "sucks the plane upwards") are both only partial truths.
Sometimes you get arguments between partisans for each of these two simplified explanations, but really both are bogus.
Sometimes you get arguments between partisans for each of these two simplified explanations, but really both are bogus.