Dopamine is chemical that makes you feel good. The algorithms are made to increase engagement. Some of the most engaging content is content that makes people angry or shocked. Look at the YouTube homepage when you're not signed in. YouTube's algorithms are not necessarily made to give people content they want to watch and were thinking of watching. And often times not content that makes them feel good.
Edit: maybe I'm half asleep and not getting what you're saying lol
Edit: maybe I'm half asleep and not getting what you're saying lol