on SO I have 7k reputation currently, which is enough to close questions but not enough to delete questions with downvotes. (I don't know the exact logic for this, but a 10k+ user once explained to me and I recall 10k+ users can vote to delete questions with sufficient downvotes.)
Flagging is incentivized. There are a silver and a gold badge for raising helpful flags. Moderators will mark flags as helpful or unhelpful which I use as feedback much like a lab rat gets an electric shock or cheese. However, something that has confused me is the "very low quality" answers that I flag as probably needing to be deleted don't need moderator attention - they need 10k+ user attention.
Similarly I had the exact same feelings at < 3k with flagging to close questions. Doesn't need moderator attention, but usually marked as helpful.
So I see a conflict between "let the community moderate, save moderators as human exception handlers" with "raise flags that will be marked as helpful." What gives?