To a certain extent, yes. But it's also the case when dissident thought is stifled, then the thought criminals inevitably coalesce in the few places where they are still allowed to speak. It has an amplifying effect. If you disagree with the jews run the world narrative, you're probably not going to go into a place like Unz review and try to debate them. So the different ideas become isolated and no real debate occurs.

It's why having some open platforms is not enough, they all need to be open. But the reality is free speech is pretty much a myth, so whatever.