Freedom of speech is not just the right to speak into a void; it includes the practical ability to reach people. Dominant communities are the modern public squares. If you’re banned from these, your ability to participate in discourse shrinks dramatically because that’s where the audience is.
When a handful of people enforce rules unevenly or with bias, they shape what ideas can spread.
If you can’t make a point without getting flagged for hate speech you don’t have a point.