Advocating for outright bans on voicing disfavoured viewpoints is so obviously illiberal and thuggish as to be politically unpopular, which is why it is always platforms targeted rather than individual speakers, and why there is always some rationalisation for the complaint other than the viewpoint being expressed (Russian bots! Fake news! Algorithms optimising for rage! Harassment!) but in the end the root cause of the complaint is always that someone said something that progressives didn't like.