I don't have any story to tell but based on my knowledge gambling most of the brings you loss instead profits. So as long as you avoid gambling then your safe.
Its good to know that there is a person like you who don't play gambling but have an idea and knowledge about it. I think there's nothing wrong in gambling, it will be wrong only if the gambler become greedy and become addict into gambling.
That is true, gambling only becomes wrong when we form a bad character around it. If you steal or borrow to gamble then you are making gambling a wrong activity for yourself and those outside gambling will perceive such attitude as wrong.
If you waste money for gambling without thinking of what the consequences may be then it is wrong. Money is needed for daily necessities and if you waste that money not only is it bad for the person but also for their family. If you understand the bad effects and stop gambling then its good for this instance. However many people play gambling for fun or some of them are compelled to gamble as to earn because there are no other ways to earn for them.