If you are somebody who does not have the willpower to stop themselves during an onslaught of 'things you want to see', it can be very damaging.

You make it sound as though it’s completely harmless. Is there not a single personal or societal harm you can imagine to having videos attuned to your interests constantly being fed to you?

“We see that you’re slightly conservative. Next up: a Nazi sympathizer video! Enjoy your ragebait!”

I mean I want to feel good all the time, that doesn't mean shooting up heroin is a good idea.