Love those first 2 questions. It is tough for parents. I've not been a parent but was a camp counselor. What comes to my mind is the turtle giving advice to Kung Fu Panda or the Splinter rat giving advice to the Teenage Mutant Ninja Turtles.

Those first 2 questions you asked is a good outline. First, perfect parenting does not always result in perfect children. Second, bad parenting does not always result in bad parenting.

It's not like parenting and growing up is going to be absolutely and purely good or bad. It's a hybrid. which means both parents and children are good and bad in various degrees. Culture does influence children.

Therefore, the trick might be to turn family life and life around friends into the major force of culture for children.

Things like television and the Internet disrupts local communities which would influence local cultures for local neighborhoods and tribes globally for thousands of years meaning whatever might be trending in Hollywood and the Internet is disrupting local influence for better and for worse.