This is a really dangerous line of argument for an example where one platform has a de-facto monopoly on views, whose censorship is fine-grained enough that people open to these other ideas simply won't be able to find them.
It makes a lot of sense for individual publications, or even Reddit banning certain communities, since people looking for alternatives will know to do so. It's a lot more insidious in a case like this, since there's no clear indication that anything is missing.
Until the alternatives are de-listed from search because "they contain disinformation" and the alternative search engines are de-listed and black-holed at the DNS resolver level for the same reasons.
It makes a lot of sense for individual publications, or even Reddit banning certain communities, since people looking for alternatives will know to do so. It's a lot more insidious in a case like this, since there's no clear indication that anything is missing.