I think what's missing here is elderly.
Arguably, that's even more harmful.
How are the elderly, who have full rights as citizens/members of society, and are (as far as the law is concerned) free and accountable for their own actions, more harmed than minors, who are none of that?
How would hurting elderly be more harmful than hurting children? I know that we are about to live in gerontocracy, but it’s still a wild statement to make.
The elderly are grown adults who have a lifetime of experience and can be expected to see through the charade and spot what's really going on. Young people are more naive. I'm almost legally a senior citizen and I saw Facebook for what it was a long time ago, and most of the people I know who are my age don't use it, they don't even like social media in general. They use email or text messages, mostly. The people who have asked me why I don't have Insta are all in their 20s.
Yes, some elderly are disabled by mental decline or dementia, that's no different from a mental disability at any age.