Quite right! At the same time, my personal view is that one of the most important parts of the community guidelines (current & proposed) is the bit under the “Skilful participation” heading:
Engage in discussions that make this forum an interesting place to be — and avoid those that do not.
I myself would extend this to taking up and avoiding responding to comments within discussions rather than just discussions as a whole.
Mods can respond to things that are flagged up, but I kinda reckon the overall quality of content here depends on the community at large taking responsibility.