I don't think that they don't understand real happiness, it's just the same happiness, it's an emotional state, it's just that it's different now compared to before. I haven't tried betting clothes, especially the things we are currently playing but that would be fun. I only experienced strip poker lately, not when I was a kid. We all need money but we shouldn't be always about money, there's a difference.
That was sort of child team game in our community, I forgot the name of the game but that happened few times. But gambling on the older age would only lead you to think about profit, you may enjoy and get the happiness but those are only secondary reason why you gamble. Evolution of gambling has happened as well, old days I wasn't aware of dice bet but now its being applied to casino's.