I think that's because gambling can only help them in their life when they win gambling because they have the money they spend on gambling but I think it's better to work than gambling, because most gamblers have quit and have start a job. But gambling still needs them to study and they must win the game, because they are the ones they can do in life.
Well, i don't think that we need study about gambling, but if you are talking about sports betting then i could say that we could win by our experience in sports betting. But in other few games of gambling no need to study or experience. Even in my eyes, gambling need only one thing, that is luck. Gambling helpful for our life only when we win in game and gambling is harmful for our life when we have lost the game. So gambling give us both and different effects on our life.
And I think its useful time is too short, mostly we only get failure and loss, and our lives become more difficult in gambling, even I felt gambling does not bring any benefit to us in life, it only brings negative state for us. Many people say gambling brings joy when we win, but that joy never lasts so long, even that can not be called joy, it's just a joke, you have just received the reward then lose the reward immediately in the next bet, I can not be happy because of this, I feel disgusted, I do not understand why many people think it is fun. Gambling only makes our lives chaotic, it does not help our lives