At least with Nostr (compared to Mastodon) this won't be a problem anymore, at least some decent implementation of the declaration of independence of Cyberspace.
"the problem is that most major states are pressuring corporations to limit speech."
Corporations want family friendly sites with only happy thoughts.
What you are saying has absolutely nothing to do with legitimate medical doctors being deplatformed because they have an off script opinion of how society should respond to covid.
It has nothing to do with kicking trump off Twitter.
What you are saying has nothing to do with any of the 'moderation' that anyone is actually complaining about.