Many gamblers are saying that they are only gambling for stress reliever but the thing is they keep becoming more stress if they lose in the gambling. For those who have a lot of money can say that gambling is for fun and stress reliever because they have a lot of money and they do not care even if they lose big.
It seems that you misunderstood them.
They are saying that it is their stress reliever because of the fun it cause to them, I know what you were trying to say but to make this short, it is different when you play gambling just for fun only and if you play gambling for fun and money, if you are like the kind of person that I mentioned lastly, then surely you will be more stress when you lose in gambling, and vice versa.