not all parents are savvy enough to know how to do it. not all parents have the parenting skills to do it, because they were not taught them in the first place. not all parents can always monitor their teen kids 24/7, because they might work multiple jobs and teens have (and rightly so) unsupervised time.

also, you can teach them how many times you want that porn will fry their brains, but good luck reasoning at a logical level with a horny teen. Even before internet we managed to find and pass around porn mags, so it’s as pointless as the war on drugs.

she probably didn’t had to go through the pain of that. Yet.