That same can happen here without communication on what is on the roadmap for Baldur's Gate 3. If we do not know what Larian is looking to improve/change, we're incentivized to keep writing about it.
And sure some contrarians came and went. But is that really an echo-chamber effect? Could they have realized their argument lacked merit? It's probably a mix of the two. The echo chamber effect is usually formed by an algorithm feeding the user information... gets bumped to the top.
That can frustrate people as well when the same thread, by the same group constant push down new threads for the same argument. I can see Sharps points though. I have not witnessed many occasions where anything was met "halfway". The forums seem to be suffering from the same problem in politics of "its is my way, because my personal opinion is fact. Anyone that feels differently, are either idiots or some other insult insinuating they are either white knights or players that just want to fap to some romanceable character.
