Indeed. I seem to recall reading that among all addictions, gambling addiction had the highest suicide rate. I haven't been able to find a good source on that lamentably, but it seems plausible to me in the sense that many other addictions (alcohol, sex, heroin, etc.) have some sort of end-point built in at which you stop, and typically have only harmed yourself.

With gambling you can gamble away your kid's college savings, or the retirement savings for you and your spouse. Seems that you can wreak havoc beyond yourself even more so than with other types of addiction.