That is a fair point, I did not attempt to make a complete list, of course, but you are right, there are more layers that could be named. All valid. The point I was making is that parents are also responsible.

eg: I grew up in a very nasty place. My neighborhood had a few pregnant 13 year old girls and a lot of drunks and smokers, including kids in their early teens. My parents kept me away from it all, while also both having full-time jobs. They put a lot of work into filtering whom I could be friends with and where I was allowed to be. THAT is the job of a parent.