I think there's no wrong on gambling the one who gamble and gamble over and over again even if he didn't benefit from that's the real wrong and besides gambling can be dated long ago we should know the history of it.
It is wrong because we spent alot of money if we treat it as entertainment then we wont really be spending alot of money so it depends on the person. For my current situation, I dont feel that it is wrong to gamble because I only gamble for fun thus I only use small amount so nothing wrong with me currently
Frankly speaking being a humanist with a humanitarian approach we need to look at the effects of gambling actually. There are many people discussing about about gambling and expressing their opinion about it. We need to look at the basic concept of gambling actually, when a large number of people say that gambling is wrong and many have the opposite thoughts about it who don't consider it wrong.
My point is I consider everything wrong not only gambling where there is exploitation, if it is by any means, if it is financial, physical or emotional exexploitation. I think people are financially exploited in gambling, if they are then gambling is wrong.