Why ban social media when ad-supported media is the culprit? Remove the incentive (to get users to doom scroll, to polarize, to impulse buy…) and you change the behavior. I remember when social media was sane 15+ years ago. The problem is the business model, not socializing. It's crazy to ban it when being a teen is the beginning of socializing!
The algorithms create the engagement, the engagement lures in the ads, not the other way around, at least that's what I think right now.