Airdrop works. Ok, it's platform bound, but I'm sure it could be ported.
It's not such a big thing, though. I hardly use it, and young people don't seem to use it either. The stuff on their phone and laptop seem separate worlds, just like mine are. Might be because they don't know about it, though.
Hell, copy and paste works between iphone and MacOS if you've got the same icloud logged into both. Airplay is too cumbersome has been supplanted by long hold -> copy; ctrl-v, and the reverse. Works for images as well.
Because we keep them ignorant. We make sure they depend on our apps that they have to pay for. You wouldn't want them to know how to download music/movies without going through our paid streaming platforms, would you?