Stopping everyone from gambling is difficult especially those who often play gambling. It needs awareness from themselves to realize that gambling can make them lose all that they have. The worst thing that can happen is to ruin their lives anytime and no one helps them. That is the big risk of gambling in the long term if they don't realize it.
It is really hard to stop people from doing things they like or addict. Gambling is very easily addictive and the reminder is always "Gambling responsibly" while we know gamblers struggle to control their actions and avoid gambling addiction is not easy.
It's true for other activities like trading in cryptocurrency market and other markets, or gaming, for example. To do it responsibly, they must be educated, knowledgable that are fundamentals for attitude and practice later. If people can not have right attitude for responsible gambling, they will not care to do good practice for controlling their bets, fund for bets, and avoid burning their finance for gambling.