“most of the times the things getting downvoted and buried are simply comments or opinions that are worthless.”

What is your basis for saying “most” of the time. This is very different from my experience and I find it difficult to measure as groupthink prevents discussion, so what do you measure.

I’ve watched many subs for hobbies I follow get boringer and boringer as mods try to enforce various rules and start moderating what’s appropriate or not. As a result, discussion kind of stopped. So I’m glad your experience is that mostly racists get banned, but I’ve seen discussions on /r/badhistory devolve into weird gender/race discussions that don’t really have a productive outcome.