[Edi]

Fliers like birds will almost always go for the eyes on a target bigger than they are. If the target sees it coming, fending it off isn't THAT much of a problem. And attacking with anything but a charging stab attack from the air has one really big problem: Leverage, or more specifically, lack of it, which means weapons that need to be swung are pretty much useless decoration. You can't get enough power behind the swing.

Give me wings and endurance and I'll pick up a bloody long spear or trident and then get back to business, but there's the problem that with those that if the target manages to dodge the stab and e.g. get hold of the shaft of the weapon, he'll use it as leverage against you to knock you out of the sky unless you let go of the pointy stick. At which point you're unarmed or need to resort to short things like knives that require close contact anyway.

Rewriting the game mechanics just because somebody has a poor grasp of the physics involved in the topic he holds forth on and no capacity for suspension of disbelief seems a particularly poor idea.