Even so, as parents we must still provide the best education for our children, because it is impossible for parents to educate their children in the wrong things.
Generally, kids learn to imitate their parents, the way they live and follow daily activities. Which makes advice from guardians to offsprings work faster than that of a school teacher. Unfortunately, parental care is rarely reaching to lots of children, due to business and momentary chase by parents for the kids financial needs.
That's right they all need money for bills, and upkeep, but the emotional training that lacks affects how kids understand things in the society. Unlike the child in the Op that asked his dad questions on gambling, others wouldn't inquire, due to the poor conversation in the household. Hence, they'll have little need to bother their dad with a question as that, and go ahead with their decision.
True, such a dialogue can only take place in a family where the father and son have a trusting relationship, and the son does not want to figure out such a question on his own. However, this will only happen in one family out of many, many, since most likely the child will make a bet himself, without telling anyone about his action. Now there are answers to all questions on the Internet and it will not be difficult for him to make this bet. Or ask friends for help.