At 14 I decided the majority of what I saw was a load of bunkem and couldn't be substantiated.

I did a similar journey, except I decided it couldn't be transubstantiated.

It's simple, really. No one is going to (willingly) tell their children what they don't believe in. That means they ARE going to tell them what they DO belive in. That's true on a subconscious level, too. So when people tell their kids that, say, bullying and violence are wrong, but in practice are seen to be bullying and violent or supporting it, they are actually teaching them their real belief, that it's OK.

And if the kids don't like bullying, can't hack it as a hard man, tthey'll reject their parents' (real) belief and seek a new one.

Distinguish between the lesson taught, and the lesson learned.