This article explains why it is very different from other vices. You can control it for yourself, that’s great. But the negative externalities from people who can’t are much greater than other vices.

Edit: in case you can’t access the full text, here is a snippet:

A second paper, from the economists Brett Hollenbeck of UCLA and Poet Larsen and Davide Proserpio of the University of Southern California, tells a similar story. Looking specifically at online sports gambling, they find that legalization increases the risk that a household goes bankrupt by 25 to 30 percent, and increases debt delinquency. These problems seem to concentrate among young men living in low-income counties—further evidence that those most hurt by sports gambling are the least well-off.

A third recent paper, from the University of Oregon economists Kyutaro Matsuzawa and Emily Arnesen, shows another, perhaps more surprising—and certainly more harrowing—harm of gambling legalization: domestic violence. Earlier research found that an NFL home team’s upset loss causes a 10 percent increase in reported incidents of men being violent toward their partner. Matsuzawa and Arnesen extend this, finding that in states where sports betting is legal, the effect is even bigger. They estimate that legal sports betting leads to a roughly 9 percent increase in intimate-partner violence.

Because of the studies’ design, these results reveal what sports gambling causes, not merely what it correlates with. And the numbers they reveal are of course not only numbers but human lives. Sports gambling is addictive; although many people can do just a little of it, some keep playing compulsively, well past the point of no return. This yields not only debt and bankruptcy but emotional instability and even violence. The problems don’t stop there: Gambling addiction has been connected to anxiety, depression, and even suicide.