Well, in the first place, gamblers cannot imagine a scenario where they will fail and enter these deadly swamps, they certainly just play on whims like a gentle player with happy thoughts but gambling plays a clearly manipulative role and by some miraculous transformation, both body and soul were subjected to the gambling demon and began to filter out the best and bring out the worst. Gambling is undeniably a criminal with an innocent face, just when we are most unwary, it will reveal its scariest and most dangerous face to us.
I think we are starting to talk about gambling rather in a philosophical even theological term or context. I don't like to associate the earnings coming from gambling with the will of someone more powerful than us, in the same manner I don't like to blame spirits and demons on the losses someone could have suffered. It is not necessary to go beyond the pragmatism and phenomena which we already know pretty well to explain what a person addicted to gambling does and why she/he does it.
Also, I would not to go as far as saying gambling is "criminal with an innocent face", many casinos explicitly state any deposit make to their wallet is supposed to be taken as lost and gamblers are not supposed to see gambling as a source of income. Stake even has a dedicated section on its website about responsible gambling. In the end, we are the ones who decided what to do or not to do with our money.
No casino will hold you at gun point until your deposit.