Do you have children?

While parents have some control, they don't have as much control as you think. It is a constant, "but my friends can do this", and you have to deal with it all the time.

Parents now have to work 2 jobs, so the kid spends most of their time outside of home.

Also, comparing FB to cars, doritos is not fair imo, FB is closer to crack. It can also be accessed on other devices than phones, WHICH they need for school. Not every parent knows how to block it, and kids find ways around road blocks anyway.