Nothing is impossible. Any addiction can be cured with enough discipline and effort and time.
That is why prevention is better than cure, some will always say that they don't have the strength of handling addiction and that is why we had better not have it than taking a curative measure against it, because we can also learn form those addicted on other things in life and see out they use to behave or choose to live their kind of separate lifestyle, to fix addiction may come in much demands form us and the better way forward is not to be addicted right from the start.
Indeed prevention is better than cure. Any time I have the opportunity I do advise people especially the younger ones not to gamble when they know they do not have the mental capacity to handle the issues that comes with it. Sadly, you can only advice but you can't stop it entirely or forcefully but gambling education is very important in our communities today. A lot of young people who get introduced to gambling newly do not usually understand the repercussions that comes with it and mostly focuses more on the fun and excitements in gambling which doesn't always become the truth later especially once you get addicted to it, you can't hold on to your normal lifestyle again