> Airdrop is a red herring. It's to solve the short-term problem of "I have a file on Computer A, and I want to transfer it to Computer B." In the end, ideally, this would never happen.

I think in the context of Airdrop, Computer B is presumed to be a different person. The transaction is "giving away" a file, in this case, not "how do I get it from my desktop to my laptop."