I had to learn a ton about it in the last year for my health-related issues. It's possible that it's just new information that's still propagating (and for some reason happens to concentrate on HN).
For reference, my recommendations came from my therapist when battling with depression (i.e. I wasn't really influenced by anything on HN).
For reference, my recommendations came from my therapist when battling with depression (i.e. I wasn't really influenced by anything on HN).