Telling a silenced victim that they can easily move to somewhere else in digital space is of little comfort when their complaint is that they are being denied access to a public audience who are habitually congregating in an existing location.
The extent to which someone is entitled to an audience is of course more difficult to judge.
I disagree with your last sentence; I don't think anyone is entitled to an audience, so it's not a very difficult situation to judge. Free speech means you can shout in the wind all day long.
The extent to which someone is entitled to an audience is of course more difficult to judge.