What kind of life is considered gambling?
There are several factors that can make people who are addicted (anything) recover. the first is probably awareness of themselves, it's like you said. The will to be free from gambling addiction or whatever comes from himself.
there are others that are coercion. It usually comes from the people around him, it could be family or closest friends. This can go through rehabilitation, where the addict's body and mind will be forced to refrain from gambling activities. This usually happens to people who may be out of control due to their addiction. or by administering a limited dose of play.

I myself am confused by the choice of the word addiction. it means something that is excessive or sounds very bad. Or can people who consistently gamble every day also be called addicted gamblers?