If you think of the Youtube recommendation system as a person, you would immediately understand how creepily this person is behaving by trying way too hard to get what it wants from you (ad clicks) under the guise of caring about you or your interests.

Just because I click on a video and watch it entirely doesn't mean I want to see more like it, and it doesn't mean it was healthy for me to watch, it could have just been a distraction. But now this system will latch on to my need for distraction and keep nagging me with stuff in the long term that is ultimately harmful to me.

I don't believe recommendation systems like this can ever really understand people well enough where a person can walk away and feel healthy about it. But they are great at generating money and that is why they exist. I can see and appreciate the amount of effort that is trying to make these systems better but they are fundamentally flawed and limited.