It is true that gambling is fun because there is a lot of excitement in us for the result of win or loss. And when we win in gambling we get a lot of joy but when we lose we often go into depression. But can't quit gambling right away. later we deposit again in gambling to recover the previous loss. If we can recover the previous loss then the next target is to make some profit. So considering these things I can say that if we say that we are using gambling only for fun then it will be our emotion. And this emotion causes us a lot of damage. So you have to bring your emotions under control first, only then it is possible to control yourself from all places.
You are right, I want to also say that that is why we should play gambling with following the rules like invest as much as you can afford lose in the op already mention that the gambler take suicide attempts and also interrupt with the crimes for managing gambling fund. I think these things will only happen when gamblers take gambling as an addiction and use it as their source of income. And we need to stop thinking of gambling as a money-making machine before such unpleasant incidents happen.