That's a possibility, of course, but since it is very important for our daily life to know how control those emotions, we can use gambling as a great playground for practicing the necessary skills. I mean, when someone is bad at math, he can avoid situations where his lack of knowledge may cost him, but, alternatively, he can learn math from engaging in such situations, and this will help him a lot in the future
Well, I can't say that I particularly disagree with your point
Basically, what you are trying to say comes down to rendering a particular trigger harmless, i.e. stopping it from being a trigger of a certain emotion. For example, you may suffer from acrophobia (extreme fear of heights) that makes you panicky whenever you find yourself in a triggering situation (e.g. on the roof of a skyscraper or within close proximity of a panoramic window near the top of that building). Technically, you could work with this fear and probably get satisfying results after some effort (or should I actually say pain and suffering?). But is it worth it when you can simply avoid such situations and happily live with that?
I know for sure that acrophobia can be treated and overcome(a friend of mine has successfully done that). Was the struggle worth it? Absolutely. Living in a city with many multi-storey buildings, it's very inconvenient, and sometimes embarrassing, to have this phobia.
Now back to gambling. The inability to control emotions is much worse of a problem than acrophobia. If you can't control your emotions, you can get in trouble several times per day even living on a desert island, let alone in a city. So, I think, curing the inability should be a top priority for anyone possessing it. And gambling can help in this regard. You may lose some money in the process, but if you will finally learn how to control your emotions, the outcome is priceless.