Why allow ads for it at all? If someone desperately wants to gamble, they should be able to find them. If all the industry is doing is meeting an otherwise unm

Why allow ads for it at all? If someone desperately wants to gamble, they should be able to find them. If all the industry is doing is meeting an otherwise unmet vice demand, fine, okay, whatever, it's better than mob-ran gambling rings, but why on earth should we allow it to manufacture demand? An argument can be made that a world where someone who is hell-bent on gambling being allowed to legally gamble is better than one where he isn't. Fine. But what argument can be made that a world where more people are gambling is better than a world where fewer people are gambling? Why encourage it? Who benefits from installing heroin vending machines in schools?