Smart yes.. but sometimes gamblers don't use their mind but in luck has them and they don't use their head but hope to win in a gambling luck has it every time you lose theirs a lesson but if you win that's luck for you
Not all, and not all lost their mind each time they are betting... Actually, gamblers are smart, they have a lot of wild things in their mind about winning, game plans, and strategies, so I think they are smart, only that the future of their bets are not theirs to decide and it is not in their control anymore...
Gamblers are having a problem not on betting but on where to decide when is enough, and those who know what should be done after, I think should be called "wise"..