For father, I can say that he can gamble out his money according to his wish as he knows what he is doing due to his experience. Also, that particular money belongs to him, so we can't impose any restrictions upon him for spending his own money, but as far as they're concerned, teaching the value of money to the children is significant. Also, as per Nevada's state laws, he was underage and legally isn't allowed to drink and gamble, so he was not supposed to do that; the responsibility lies with the parents to prevent him from performing any illegal activity.
day by day, educating children is getting more and more difficult, many parents are no longer able to reach and even educate their children, that is the reality faced by parents in this modern era. but as a parent, it is an obligation that must be carried out because that is the responsibility of having a child. Gambling at an early age is very concerning, keep an eye on your child's circle of friends and even your nephews.