I think there were only three occasions in natural history that a species larger than an insect evolved the ability to fly, namely:
- the bird (fossils suggest it evolved from a type of feathered dinosaur),
- the bat (fossils suggest it evolved from a mammal), and
- the pterodactyl (extinct - fossils suggest it evolved from a reptile).
As shown in the diagrams in Cofty's OP, the bird and the bat have very different wing structures. For the bird, the fingers have shrunk to virtually nothing, and the feathers provide the rigidity. For the bat, the fingers became very large with a membrane or webbing between the fingers. The pterodactyl wings are very different again; the fingers are still there (and the elbows play a role), but there is one enormous finger and the rest are stubs.
All 3 creatures have hands and fingers (or the remnants of them). All 3 have very different wing structures. Surely one way of creating a wing is superior to all others. So why would a creator create three completely different ways? Further, why would a creator use the fundamental bone structure of a hand, each time? Evolution provides an obvious explanation for each of these questions.