I doubt that you can stop gambling when you are addicted since it’s very hard to notice the symptoms due to the addictive nature of gambling. The only way for a compulsive gambler to stop is if someone help him to change or he doesn’t have any money to gamble.
If someone is going to help change the gambler is a plan that's very hard, unless the person acting as the helper will devote 85% of his or her time for the addict, because is like a kid that you monitor 24/7 so he (gambler) can't go offline.
And we know how difficult it will be because you as the helper can't have that comfortable time for yourself. Keeping an eye on the gambler has to be under strict rules, no messing around or having pity for him or her. So I can't say is going to be very easy to accomplish.
Instead of that, it's better to put the gambling addict in rehabilitation; there, they will be monitored and slowly helped to forget about gambling. But no matter what we say here or suggest, the change will depend on the gambler itself; if he does not help himself to get out of the influence of gambling, then nothing will happen. The other things will be just support for that person to change. Let's say all your advice is followed by the gambler, and he will not be cured as long as he chooses to still play gambling. So I believe only that person could help himself; I believe people have the dedication to do that. But that will be a different case if the addict itself is beyond help, even if he can't control himself. Possible solution? Ban gambling that's it but we know it is impossible gambling is everywhere even in life it is a gamble.
So do you think banning gambling will be the best way to regulate gambling addictions? Do you? Because for me, I believe that inasmuch as gambling has existed in a place, banning it, you are likely wording the whole situation, as an addicted individual can go an extra miles just to have that freedom of gambling he/she has been enjoying before in a distant far away country. So for me, I think the first statement you made about rehabilitation should be a better idea, where, they will be monitored and slowly helped to forget about gambling, and secondly creating a platform where people get educated about the danger/effects of gambling addiction, and how it's likely to destroy a persons life will go along way helping people to gamble responsibly.