I don't see any advantage of the gambling. All of my friends joined and played gambling, but all of them are loss. At the first when play gambling, the profit is high but then is always lose and lose. So that I think gambling is a waste of time and not an advantage, the disadvantage of this is more than the advantage. A lot of families is broken up due to this game.
If you will thinking of it, there is one simple advantage of it.
I think it is not an advantage, it is a moral lesson, a realization that will hit them after they gamble. They will be thinking the losses that they made and make them concious to what they are doing with their money. They cn realize how hard it is to earn money and we should not rely that or risk them through our luck.