Nothing being out there, may only prove they don't know or didn't feel it necessary to go down that road. Believe what you like.
Your idea that kids are only influenced out in the world is the same a liberals saying society is to blame. It doesn't wash with me and never have. Until my kids were out of school and on their own, I (that is we) held ourselves responsible for what we produced. For us, it worked, but we cheated by knowing what we were doing when we got married, not having kids until we were ready, following the basic patterns that we learned, and my parents learned and grandparents lived, and staying together, and doing the right things, teaching the right things, reinforcing the right things.
Other ways might work, but this did work, and part of that was holding ourselves responsible, until they could be successfully responsible on their own. That works, not thinking our kids were beyond control, simply because they went to school, were out and about with friends (we knew their friends, by the way) and not turning our kids completely over to the system, as if powerless pawns in the societal bullshit.
I understand you, and it is boring the shit out of me.