But in some cases this blend is not great. I wouldn't put HN as a great place to get your knowledge of more social, cultural content. There are good articles on occasion and of course great users/comments, but there are times when I am confronted with the fact that there is a remarkable homogeneity which is reflected in the discourse on race, gender, politics, etc. This is a site populated by primarily tech workers and we have to face facts that tech workers are predominantly white and Asian and male, indeed predominantly cis-hetereosexual male. I don't mean any of this in an accusatory fashion; this is simply the reality of tech. But it does mean that the discourse is not capturing the entire spectrum of experiences and the few voices who do not fit these paradigms can, on occasion, be overwhelmed by the majority.
Not to mention, as a tech worker forum, I'd hazard that the average commenter is far more well versed in tech than in say, US politics or third wave feminism. Much as we'd find the discourse on technology in a politics forum rather naive and uninformed, I'd have to imagine that a politics expert would find the political discussions on HN similarly so.
TL;DR: Use HN as part of a balanced information diet. Read books and try to get out of the tech worker bubble.