One thing I don’t like about Nostr is that you have zero ability to lock down who has read access to your notes. I guess unless you run your own server, but even then the nature of the protocol is to spread notes like an unstoppable virus. But 99% of people don’t want that.

Nostr sacrifices safety for proliferation, which is not that trade off that most people want or need.

Does Pubky differ at all in this regard?