An amusing XKCD.

That was the question I always had when people explained how wings worked and the Bernoulli Effect. The answer, of course, is that there are lots of ways to get lift, but that this is the most efficient one with the least drag. You can get lift from a barn door. Stick your hand out the window in a fast car, and you can get lift by just increasing the angle of attack, but the L/D is terrible. So when aerobatic planes are upside down, they have to keep nose up (down, from the pilot’s perspective) and up the thrust quite a bit to maintain altitude.