The writers simply don't have time to skewer everything that might deserve it in a single 4-minute spot. I'm sure that they aren't particularly in favour of unsupervised pre-teens, and are probably able to find a gag or two there if needed, so they might get around to addressing that in time.

Handing your kids an iphone or ipad with an attached credit card is insane.

My father's iphone has two apps on it: some golf thing, and Angry Birds. He played the latter for two minutes because he was curious. I certainly wouldn't brand him "insane" for not knowing about the Mighty Eagle and handing his phone to a six year-old.

didn't bother to "skewer" unsupervised pre-teens.

That however, is probably because outside of today's age of helicopter parenting, unsupervised pre-teens is just a thing that happens regularly.