If smokers can quit smoking, then quitting gambling is definitely possible. It all depends on the person in question. Sometimes these habits are not just ordinary but might be backed by other forces(spiritually). For someone to quit gambling, they have to go through many process which they might find difficult. They will have to engage them selves with another thing that will take the place of gambling. Something much fun, I really don't know what it might be, it all depends.  One can either try to quit gambling Or learn how to gamble wisely which might be a better solution.