As a parent...I don't see how this is at all Apple's problem.
My wife and I have been using the OurPact app (the free version) to control/monitor our children's phone use, and it has been working out perfectly.
Apps like this are useful, but all they do is make your kids become better hackers.
Just do a search for: OurPact hack, and you will find a huge source of hacks.
No software can totally replace true parental control by the parents.
All the restrictions imposed now will be gone once they turn 18, time when they will go crazy out of control, because the restrictions are gone.
Wouldn't it be better to teach them how to be responsible, develop good habits because that's what they believe, not because they are being forced to do it?