Large platforms (twitter, YouTube, etc) banning views that they don’t agree with gives them power to truly shape society by controlling acceptable discourse.
What they deem outright information may in fact be true. And even allowing clear misinformation (1+1=3) is important. We need people to learn to process information not protect them from it. Using 1+1=3 analogy, wouldn’t you want people to rally around tooling people to learn math?
Censorship is bad even when legally permissible. And we should still fight corporations acting unethically even when the law is on their side.