> going around reviewing other people's discussions isn't really a valuable role in society

You are literally describing parenting, which has an extremely valuable role in society.

On a broader note, I recently had someone quote that classic adage "great minds discuss ideas, average minds discuss events, simple minds discuss people" at me and I just had to push back. Conversing about the behavior of others is how, by design, humans negotiate cultural values, morals and etiquette. That's not something to be sneered at.