Why would you want a password manager from which you can easily be censored?
Redundancy is super important, especially for password managers.
Discussion
who's censoring pass managers? and who will do it?
I agree that redundancy is important but if we start using nostr as a distributed db for whatever you need (contacts, media, passwords, code, etc...) wouldn't that bloat relays and make relay operators require a monetary incentive to allow you use them?
I guess nostr will fail to scale gracefully.
You could have just one single relay for storage, if scale is the issue.
Another benefit is that there might be multiple clients that can be used to retrieve the passwords, so that bitrott of unmaintained clients isn't an issue.