Thats a bit naive take to respond politely, I presume you don't have kids. You can't guard them till 18 100% of the time. Parenting adds value when parent is around and that time you can safeguard, which in school they're not.

Ever tried to discuss not having a phone with 16 year old teenager? That's a sure way to to make him/her a target for school bullies. They are still extremely vulnerable to addictive things I've mentioned.

Companies are amoral and are driven by profits and nothing else, some long term considerations are up to society to enforce via regulations down companies' throats. Also seemingly foreign concept to you.

Protecting children from real or perceived threats, temptations, evil things, etc was much easier in the physical world. In the virtual world it's much harder to put up fences.