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.
Parents should be blame the way children handle money. Any child that spends money with no control, I believe the parents allow such freedom to be so. A child who has a good up bringing will never spend money in a wasteful manner.
Every parent loves their children very much and they want their children to live a good life and their children to get freedom and establish themselves, so many parents give extra financial support to children because of their love and they give them extra financial support. Believes in children and does not care to keep an eye on them. Due to which many times children get more money and use that money for various illegal activities. So every parent should be aware and keep an eye on their children so that they get freedom but do not indulge in any kind of vices.