I don't think that's a fair example. All of those companies have private data-- like your email.

Nostr competes with Twitter, which is all public data anyway (mostly). And neither platform really hides your true identity from the government. It doesn't matter if you use a pseudonym-- if you write your thoughts in a public forum for a while, it is trivial for you to be identified.

Not that there is no value to be had; of course there is.