I think you are so right. Society seems to think that how children turn out is fully the result of the actions of parents. Whilst this is correct to some extent, in most cases from the early teens children are distinct individuals who will make their own decisions and mistakes. I think this is even more true now than it was when I was a child, the diversity of information and views they have access to pretty much ensures that there would view will diverge from that of their parents.

As a parent, you can provide an example of behaviour and whilst the child is young provide restrictions and discipline as necessary, but beyond a point, your work is done and it's up to them.