There's nothing paradoxical about this. In fact, people arguing for platforms to more heavily moderate content are implicitly requesting what you describe.

Actively silencing voices doesn't stop those people from speaking or change their minds, but it does push them to find new places to converse with others who share their ideas. As such, it should come as no surprise that people with fringe or hateful views make up many of the early adopters on explicitly lightly moderated platforms.