I understand your point of view but parents managed to do without cell phones for decades and it was not a problem. Apart from the 911 example, it seems to me that parents are buying them a convenience (not sure of this word) in not having to wait 5mn more if the practice is not over when they show up.

In fact, it’s like letting the tv rise your kids because it’s easier and give you time back.

On a last point, I agree with your last statement, and I think a téléphone with 3 buttons will be the best of both worlds :)