Now imagine that this gambling expert is you. What arguments will you give? What will you tell the patient about?
Please note that the patient will resist to the last. He will give counterarguments. For example, that he will get rich in the future, he’s just not lucky yet.
What other arguments do you think the patient will give? How do you respond to these arguments of his?
I think that question is irrelevant to ask here. Even let's say we are gambling experts here, dealing on how to help others to stop being addicted to gambling is out of our field and it's not our business anymore to be involved on that. If you really need an accurate answer, you can seek answer directly at the gambling rehabilitation center and they might gave you some previous of the process they are doing to deal with their patients.
It's not as simple as asking these addicted gamblers to do something.
The person who specialized at handling addicted gamblers will give you the best response.