Even if Facebook implements these controls, what guarantee do we have that another social app won't come along without these controls? Do we regulate TikTok, Yo

Even if Facebook implements these controls, what guarantee do we have that another social app won't come along without these controls? Do we regulate TikTok, Youtube, Snapchat, GroupMe or whatever the latest flavor of the month is as well? There are probably thousands of startups that would jump at the chance to monetize teenagers even if FB were to step aside.