A monitoring solution might have worked for my case if my parents had monitored my Internet history, if they always made sure to check in on what I thought/felt from what I watched and made sure I felt secure in relying on them to back me up in the worst cases.
But I didn't have emotionally mature parents, and I'm sure so many children growing up now don't either. They're going to read arguments like these and say they're already doing enough. Maybe they truly believe they are, even if they're mistaken. Or maybe they won't read arguments like these at all. Parenting methods are diverse but smartphones are ubiquitous.
So yes, I agree that parents need to be held accountable, but I'm torn on if the legal avenue is feasible compared to the cultural one. Children also need more social support if they can't rely on their parents like in my case, or tech is going to eat them alive. Social solutions/public works are kind of boring compared to technology solutions, but society has been around longer than smartphones.
Should the state have force your parents to give you up for adoption? That's the social support the state can offer.