If ever the government will ban gambling, people who want to gamble will eventually find a way to access gambling sites and casinos. They will just be creative in accessing those without the authorities ever finding out about it. People are stubborn especially if they are really that interested and hooked up in betting and playing, they will find ways regardless. It's not as if it will really solve the problem by prohibiting people, it could only be a band-aid solution while the dependency in addiction haven't been addressed yet.
Indeed, gambling is someone's responsibility and not anyone else's. If they don't want to suffer the consequences, then they must do themselves a favor of not spending too much time and money in it. Addiction doesn't just occur instantly, it is a bad habit built over time. So staying away and choosing yourself and your sanity will save you from it. Limiting the engagement by not feeding your thirst to it will prevent you from being addicted.
With today's easy Internet access, people will easily find casino sites where they can continue gambling if offline casinos where they live are prohibited from operating. By gambling at online casinos, it makes them free to access casino sites anywhere outside their country and no one will know they are still gambling at online casinos. It also won't reduce their time gambling and can actually increase their gambling time because gambling at an online casino means they can gamble wherever they want.
But if someone can have good responsibility in gambling, he will not gamble too often and even though he can gamble at online casinos, he will still limit his gambling activities because he knows that gambling more often will only cause problems for him. They don't want to get into trouble just because they gamble too often so they really control their gambling game. They will also look for other activities that can help them divert their attention from gambling so that they will not become addicted to gambling.