Edit: people are apparently not getting my central point here: it might be that, if you’re a conformist, you see a whole bunch of people nodding and saying roughly the same things and think, “this is a lively discussion!” But then see people disagreeing with you and think, “what happened to this once lively community?”
But, it could also be that we’re talking about something else. But the parent post is too vague for me to tell. I sense a more concrete suggestion coming on? Maybe related to the power of downvotes to silence dissent?