I have the impression that the explanation of "Why wings work." is driven towards the Coanda effect more. However if my puny brains don't misunderstand, I woul

I have the impression that the explanation of "Why wings work." is driven towards the Coanda effect more. However if my puny brains don't misunderstand, I would think planes can fly mainly because of drag. Question: What would for example happen if we move a imaginary wing, with a infinite surface (so that there is only a bottom) at an angle of attack.