if you do this npub->taproot address thing, you just sign up to nostr (create a keypair) and start receiving. I see the allure.

To quote Calle:

1. set <your npub>@npub.cash as your Lightning address
2. set up a cashu.me wallet and login with your nsec (or signer)

You're done.

Clients could set this up automatically, of course. Same principle, without the footguns.