sommerfeld on Nostr: They are different layers of abstraction. In bitcoin you also have raw addresses and ...

They are different layers of abstraction. In bitcoin you also have raw addresses and the ones in bench32 format.

Hex keys are pure numbers so they offer a lot of flexibility.
npub/nsec make it easy to distinguish public from private keys so they have better UX.

A future really good client will abstract any of that away anyway and the user won't even know what a key is unless they specifically look for it.