Thx first off for question coz a buddy several mths ago couldn't understand why we admit being powerless over a disease or drinking;guess what he's doing today? sponsoring someone! As for comparing it to obesity, that's neither here(bit of a stretch but I could be wrong) nor there imho coz as earlier posts have shared, I can't have just a shot of whiskey & call it a day but have to keep pounding till I pass out.
If you didn't harm family &/or friends when drinking, then of course need not apologize & more power to you coz that's rare to hear of
But the fact that you posted your question & concern about AA, which by the way there's nothing wrong w/ it coz just celebrated 80 yrs last yr having transformed millions of lives around the world including mine, shows your curious & want to change the way of living.
Suggestion would be having an open mind & willing to try it out for a good solid year, then post back an honest assessment