How do we determine at what point something is “too addictive” to be allowed?

There are many people who can gamble responsibly and enjoy it. I love playing poker, and play in a tournament every few years. Lots of people are compulsive gamblers, though, and lose it all.

Do I have to give up my hobby because some people can’t handle it?

What about drinking? I enjoy a happy hour once a month or so, and have a couple of drinks when I do. Others drink 10+ drinks a month. Do we ban it because of the people who can’t stop? (We know how well that works)

I am not saying we do nothing, but I don’t think it is as easy as “just pass legislation”

We know how full 100% alcohol prohibition in 1920's worked in the USA, but what's missing is that it doesn't have to be a full 100% for it to benefit society. Laws restricting sales, like no selling alcohol past a certain hour, or on Sundays, still exist on the books in many places, and while I can't speak to how well they actually work, given that we'd just stock up on Saturdays anyway, there's also no Al Capone levels of violence in places with those restrictions. So let's not say "we know how that goes" hinting at 1920's prohibition, which was over a century ago now, and just leave it at that.

For a counter example, I like driving fast. Really fast. Should I be banned from doing that because other people can't handle that responsibly? Society has looked at that and decided that, yes, no one should be allowed to do that on public streets. So I keep that behavior to the race track and sign an extra liability waiver in order to do so.

Why should gambling or alcohol be treated different from that?