You would have a point and I would agree with you if the "rules" were being applied evenly. For example, twitter has banned accounts or suspended them for COVID or vaccine misinformation. Cool. But it leaves Rachel Maddow tweets up that talk about the vaccine making you immune to COVID which we know is patently false. Even if when she said it we thought that was true, though the CDC never made that assertion just allowed people to think efficacy meant something it didn't, we for sure know it's not true now, so why aren't they requiring the posts to be deleted or suspending her account? It would seem that one side is taking far more hits than the other. It's not healthy for us as a society, we can barely have a civil political discussion now, and pushing people into their echo chambers won't make it better.
The discussion about how to deal with these companies is a tough one. On one hand they are private companies, but they are also the DeFacto public square now for better or worse. I certainly don't think that twitter is a good place to have a meaningful discussion about anything, but people do try (and typically fail) to do so.
I dont have a good answer to the problem, but it's something we need to discuss without screaming at each other or envoking Trump, the Nazi's, fascism, or whatever other mud slinging, that will kill any reasonable discussion.