A high percentage of IT, software engineering, and professional advice on HN is very valuable, but the percentage of other kinds of commentary that's valuable is much lower. I occasionally also get sucked into the sorts of debates that I just shat on, but most of the time I find myself having to scroll past huge chunks of comment sections because half the sub-threads are pedantic political debates over some term or whatever, nested 10+ levels deep.
To be fair, we can expect some diversity among several millions of readers from many different countries, points of view and experience in different fields.