I'm not the person you're responding to, but I myself prefer giving the users the moderation tools that affect only their view of the content. Users trying to save other users from posts they personally disagree with, in my opinion, can lead to echo chambers just by itself. Let me configure my account so that I can block or mute specific users or highlight keywords I can add to a list or allow users to tag posts. That way others can express their opinions in more ways than just commenting and I can use that data to determine if I want to read the existing comments or not.

I do think HN is one of the better moderation systems since this is one of the saner places on the internet and you can still configure things so you can at least see all the content, though you can't interact with it all. I would just prefer it if I was in charge of saving myself from bad opinions or whatever motivates people to down vote posts into oblivion.