I read your comments on the commit. Would it not be fairly easy for a chain analysis company to run a nostr node to scan for notes containing bitcoin transactions? If the node seems trustworthy otherwise (they pretend to be a good actor), how would we know not to connect nostr clients to it?
https://github.com/nostr-protocol/nips/pull/476/commits/b77a747c8ab266dd3e6c9c5fcb53c4fd6786aff2