I don’t think there’s an evolutionary need for us to fly. Especially as we have planes, jet packs and lots of other methods of transport.
In terms of flapping… The heaviest birds weigh about 4 times less than we do. Even if we scaled up their wings to the size which would work for humans, we don’t have the muscles to be able to move it. It’d be like moving a 6m wing with a 1m arm.