Alcoholism, Evian, is not self-inflicted in the way getting drunk is. Could be argued that it's not self-inflicted at all, because it is so insidious. Nobody chooses to be an alcoholic; it's not a lifestyle choice !
The normal person gets drunk as a skunk and regrets the decision. The alcoholic doesn't need to get drunk like that. He has a drink and gradually feels he'd like more but is not aware of that. The reward for him is he feels more content; later he will feel anxious or plain scared if he doesn't have a certain level to function . He may never get really drunk. But the addiction is slowly working, and he gradually needs more. He has met the trigger point. After that, and it may take many years, he gets to the point where everyone but him notices he is drinking quite a lot, not that he cares much because the drink is taking over his life and he is in the first of the stages of denial and then he reaches total isolation. If it's was a matter of being weak willed, how much strength of will does it take to know that you are losing your job, your friends, your family, your money, and still decide that you'll have another drink !