It's just the sad state of the world that the most aggressive, but voice-defining leftists would like to live in a situation where politics is talked about less but take a speech-impeding dictatorial rule as the precondition to allow for something like that to happen. Meaning, as long as every person in the thread or platform has somehow been "vetted" to not be conservative or even moderate, they'll act "normal". (and that ignores purity spiraling in such echo chambers making even that a stretch)
Maybe in one of the futures of this planet people can go back to not being as polarized and twitchy about talking with people with even the opposite viewpoints. Increased amount of mutual respect in a conversation plus all sides having more mental robustness reduces escalation, reducing the speech and experience of having the kind of speech you probably are talking about to a very manageable level and is absolutely best for everyone.
I've learnt to personally take a lot of pains to maintain communication lines with even some quite extreme leftists and actually managed to retain a level of mutual respect with people some of my peers don't even dare to talk to. The end result makes otherwise impossible things greater than individuals could achieve, possible. But it's not very fair feeling like the human in the "pigeon vs human" chess match at times.
Regardless of everything, as long as we're not in some kind of shittyfuture war scenario, I will not stop believing in the concept of a "public market square" of free speech. I don't believe there is any other value that can keep an intellectually diverse human society together.