I've read studies that show most problem drinkers solve the problem on their own, much as you've done. Essentially what you're pointing out is addiction is very individual. I used to get drunk every day, 365. The AA approach works for me (although I no longer attend meetings...the piousness is a problem, although that varies widely from meeting to meeting, group to group) because I know myself well enough to know that I really don't want and never wanted to drink moderately. If given the chance, I like to get drunk. So life is FAR easier for me drinking nothing at all than trying to do something I never wanted to do which was, say, 2 or 3 beers, then bed. Or A glass of wine with dinner. Etc. The only reason I ever did that was work the next day or I couldn't have 8 glasses of wine without being obviously an outcast in that crowd who are only having 1 or 2... Plus I tried the "moderate" thing and failed pretty miserably. A few months under control, then no longer under control.
Anyway, the point is 'harm reduction' versus abstinence is a very legitimate goal for lots of people with problems of addiction, whether alcohol or sugar or 'hard' drugs. All those feed the same metabolic reward pathways, and we see the problems all around us. One doctor whose lectures I've watched online and who does bariatric surgery gives a compelling case that his real job is treating sugar/refined carb addiction, and if he doesn't do that the surgery will fail. So part of his screening pre-surgery is making sure his patients develop a plan to deal with that, and it's mostly handling stress, community, etc.