Ok, think about it this way: If you had wings, you could do the 2 following things:
1) When you fall out of a plane at 20,000 ft and your parachute fails, you can flap your arms, err, I mean wings. Ok, so you might still hit the ground, but you won't splatter as much when you do.
2) When you b!tchslap someone, if you have feathers on your arm (e.g. a wing), there's a good chance one of the feathers will hit the guy in his nose, then he'll sneeze and look like a total moron.
See, wings aren't completely useless.