I will advice him to stop gambling. I will not help him at all than to buy only food for him and it will not be expensive ones but cheap ones. He should stop the addiction and start a better life. It is as simple as that.
This isn't a bad idea and considering the fact that you are willing to help makes you a good person. But from experience doing all of these things might not tackle the situation, even after giving advice there are lots of gamblers that would still continue gambling. They might promise to make a change but it's going to be all pretence because their focus hasn't changed. Changing an adducted gambler isn't easy
Changing an addicted gambler is not as easy as we think because we are not addicted to gambling. I agree with you. In fact, I also have a friend who is addicted to gambling and it is slot gambling. He has reached the level where he lost his career and his wife because he became a gambling addict. It is difficult to stop gambling if you do not have a little awareness in yourself. I really can't imagine how much a gambling addict suffers when they have no money to gamble. I once gave him a little money to start a new life but it turned out that he went back to gambling with the money. Finally I decided to just help him by inviting him to eat together. I didn't even dare to give him a job because he was a gambling addict.