You totally ignored the point OP was making! Even if it is a parenting issue, simply declaring that will not make parents parent better. It's the same reason why we ban children from drinking wine, because parents cannot be relied upon here.

Unless your point was that we should legally ban kids from handling phones, which I think is too extreme.

But that is my point.

Chase the responsible adult if you see a kid with an overpowered phone, much like you would if you found the same kid with a bottle of wine.

And granted, we don't have locked-enough phone in market yet, but that's a solvable problem if we were to create that market.