At least the random crap on HN is intellectually stimulating.
Maybe you learn some new things here and there the same way someone who watches a lot of Elimidate might pick up some social skills/awareness.
But notice how convenient it is to attribute bad qualities to the thing you don't even enjoy in the first place, and positive qualities to the thing you do enjoy.
No one cares besides you. And in the end it probably doesn't matter which one you pick from a purely logical point of view :)
If anything I'd even argue that reality TV takes away a lot of humanities from you like social skills and social perceptions.
Honestly, in a lot of cases, yeah. I'm never going to use the vast majority of what I read about on HN, it's simply not in my sphere of work - it's fairly pure entertainment.