This is a good observation. I feel like I tell myself HN is a source of information... but it really is not. You might learn "the news" from HN, but you are not learning per-se. I would point back to another comment that reading will give you more learning. I think a fair number of us may have (temporarily) lost the ability to sit and read un-distracted. I know after about a mere 10 mins with a book in a quiet room, I get antsy.
I learned this very thoroughly one day when I came across an interesting article outside of HN. I immediately went to post it on HN only discover that not only had it already been posted, I had already upvoted it!