They will eventually get out of that addiction, we have friends and family who can help us and I don't think they are in big number.
I believe only few are addicted in gambling and in the worst situation, most gamblers who got addicted were able to fight it to get out.
They should do that if they want to solve their problem with addicted to gambling. They can hide their problem because they don't want to see their family will get angry to him but trust me if you love your family, you need to tell them and ask them to help you. That is only the way to solve the problem. You cannot solve by yourself because you will always come again and again to the gambling places.
You need other people to help you, but you must tell them right away so they know what they should do to help you. I think his family will understand him and will search a way to solve his addicting and if necessary, his family will ask him to go to psychiatric to get a way out.