Probably a very dumb attempt but Doesn't the leading edge being thick and rounded up top deflect away air from getting to the slant-plane right behind it creat

Probably a very dumb attempt but Doesn't the leading edge being thick and rounded up top deflect away air from getting to the slant-plane right behind it creating a low pressure zone above the wing? Same will apply in flat-wing cases because angle of attack will cause same effect. What am I missing?