Does that work for you because the people you would need to prove your identity to know you because of your node, and value control over it as the highest form of proof?
I suppose then, to contradict my initial note, that access to a domain (and normal use of it) might be the best proof of a writers identity to his regular readers. Even better than access to his Nostr keys.
Here's a question: we see a note from your npub tomorrow saying your node has been hijacked/stolen, and a post on Twitter that proves it has access to your node saying your nsec was compromised - who do we believe?