>But I still visit HN and YouTube multiple times daily.

Youtube is definitely the greater evil here. Anything with an algorithmic feed and an engagement-based UI will be harmful to you. HN could be harmful in a much more mundane way, the way that some kids could get addicted to Pac-Mac. There's nothing really addicting built in, but some people are susceptible. When it comes to algorithmic feeds, everyone is susceptible.

It's not the algorithmic feed, it's the karmic feedback hit ...