It might look funny, but it striked in my mind. Why don't we have a gambling insurance. This means a premium to be spend every month. Through this one can be availed with two claims per year. Here the user needs to list the sites he use. When the person goes for claim, the data regarding the loss will be collected by the insurance company and provides with the insurance amount. Many won't like this, because of the privacy issues.
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^ Because probably in my opinion gambling is not all related to money/finance. It supposedly gambling for fun that only gambling an amount of money that you can afford to lose. Why do you continue to gamble if you don't have money if your money cannot afford to lose?
That sounds really fun and I think no one will have this gambling insurance company service, however, you can take a loan if you really want to gamble against your urge but that is a different story here.
To OP, gambling should not ban because gambling is not a source of income and not a threat of financial if you know how to control yourself, gambling is for fun nothing else.