Not me but one of my relatives and I really see how addiction changes the entire life of a person, it changes everything. If some people say it is easy to stop addiction, I certainly disagree with that because until now he is still addicted to gambling despite the fact that he heard advice from us (friends and relatives). And I found it difficult when you (as a gambler) won't help yourself to get out of the cage of addiction. Advices is useless, they will only just listen but no action has been made. In the end, it is hopeless and a waste of time, and I think the thing to do is to let him do what he wants.
It's true, when someone is addicted to gambling, of course they will experience changes in their life, where at first they didn't know about gambling, maybe they will feel that their life is peaceful and peaceful. However, when they become addicted to gambling, they will experience problems that are difficult to repair, such as financially and even their mental health and relationships with the people around them, including their own family or relatives. and indeed stopping someone who is already addicted is very difficult, in fact I think even if they get advice from many people it is unlikely that it will be able to make them realize and stop their addiction. It's true what you said, they might listen, but they won't take action that leads to getting out of their addiction.
maybe allowing him to do what he likes is the right way for them to feel the most fatal point of misery and can make them realize that the gambling they do is something that has really made them experience misery, because if they become addicted it will make them If they have a higher sense of selfishness, it is impossible for them to accept advice from other people, even those closest to them.