Apple does this because the alternative would be devastatingly bad press.
I mean, why do they permit 3 day trials that start billing at $9.99/week after that? For an app that creates ringtones? How many phone apps in the world are worth $520 per year?
And BTW, that "3 day trial"? It's actually 2 days since you have to cancel at least 24 hours before the subscription renews. So it's really 33% less than they claim.
If your child signed up for one of these subscriptions? Apple requires that subscription be canceled from the device that made it — yet provides no obvious way to determine which device that was. Is that child away at school? Too bad. Forgot their phone at a friends? Sorry about your luck.
The whole thing is absurd - letting a minor child control their own subscriptions with no way for a parent (the actual credit card holder) to cancel it unless they jump through a bunch of support hoops.
Apple doesn't get a pass here. They're just smarter about it all. I say that as a huge Apple fan generally.