Each religion has their own rules and belief and that's why if some of the religions don't allow their members to gamble, some are saying that it is totally fine.
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Yes, gambling is prohibited in some religions, but it is also a fact that the person who wants to gamble will gamble without caring about all this. For example, gambling is prohibited in Islam but there are many muslim who gamble.
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But unfortunately, not many people can control this and even get frustrated when they lose control and see losing money in front of them.
I believe that one who cannot bear loss should not gamble. Because every day is not going to be good day for him. Sometimes you win and sometimes you loss.