But we don't put barbed wire on random sidewalks and then blame parents if a kid walks over it and gets hurt. There is the attractive nuisance doctrine, among other things.

Viewing the continuance of our race as only the responsibility of parents is pathological.

Moreover, children are all of our [mid-term] futures too. If education fails, there are no doctors for anyone not ultra-wealthy.

You have to look from the other direction too - children have natural rights and deserve to be extending dignity as humans too.