The iPad, as it is, is very tempting for kids (and not only kids). To leave such a toy in the hands of a child is like leaving a big bag of chocolates in their room and telling them to eat responsibly when they are alone. Apple wants parents to police their iPads by hand instead. I have many other things to do than police children's gaming. We are in the age of computing now, if they haven't realized. I want nice stats with total time per app per day, like some parental control apps offer on Android.
In practice I was forced to confiscate their iPads and give them Android phones with big screens and good parental controls instead. Never gonna buy an iPad/iPhone for my kids again.
I am sure Apple does it for self serving reasons like "Don't limit their gaming time in any way, and sales with soar!"