Once we have those kinds of meds, I'm fairly sure that you see the gambling industry implode. They are hyper-optimizing targeting exactly those reward circuits for a reason.

There's not just the question whether the individual needs to be saved from themselves, there's also the question whether we let the predators roam free.

If someone believed they could cross the Atlantic ocean wearing nothing but shorts and flippers, you get to a difficult decision rather quickly. But if they're drunk and somebody is trying to guide them into a dark alley where you know three of their friends are waiting to rob the person, there's a good moral argument for a) saving that person from their fate and b) disposing of those four who are a net negative contribution to humanity.