More than end-point, it's about harm throttling. Cigarettes will kill you, but there's only so many cigarettes you can smoke per day.
Limit gambling to symbolic amounts (maybe a monthly limit of the minimum salary in that country), and see how it goes.
You might even have gambling companies lobbying to increase the minimum salary!
One thing the UK did was to ban gambling companies from accepting credit cards.
How do you define "gambling" though - the YouTube ads I see for crypto trading apps and outright betting apps look very similar. Mind you I don't gamble or "invest" in crypto...