I think what's missing here is elderly. Arguably, that's even more harmful.
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.
I don't know that I would agree it's _worse_ than what FB does to children. But there's clearly a parallel, in that a vulnerable segment of society is prey to a careless corporation and the heinous ecosystem of scamers and abusers they foster.