Jareth
FWIW, prior to my attending AA, you would not have got me into an AA room with a rope and a pointy stick. I loathed most people, especially strangers, especially non-drinkers, especially people who didn't hide their true feelings and especially happy people and AA sounded like it was full of the lot of them - in other words, a freak show. Then I was forced to consider going (because I was a piss artist, and because even the local alcohol management service said, "try AA" when I phoned them up) and at that point I found out you went regularly and they often took place in church halls. I said not a word, but my heart was crying out, "fuck THAT!"
Then I actually went to one. I was even more put off by the use of the word "God" which I assumed meant I would have to go to church (in fact I was, and remain, an agnostic - it has never been a problem) and by the honesty of people. Women - WOMEN, mind! - admitting to pissing the bed, and laughing about it! Men - MEN! - talking openly about their feelings.
It was a huge relief to learn that they had not been waiting impatiently since 1935 for my arrival and I would not be required to say anything unless and until I was ready.
8 years on (7 of them without an alcoholic drink of any description) I still go regularly, still enjoy going, still don't need to drink - and am still an agnostic.
Oh, and my life is now better in every single respect, to the extent that I would not swap the worst of my days now for the best of my days as a drinker.
So, while agreeing that you are free to make the choice, I would question how much you really do "know" about what it will be like and how you will feel until you actually go to one or two and find out. If it was a new bar, you'd go and take a look, wouldn't you? And I guess you'd judge it more on the people than on the flock wallpaper. Maybe treat AA the same.
Unless you have a better idea?
Incidentally, I have no more idea than you how long you will last on 100 units a week - but, as the 10 years figure is clearly plucked out of thin air, I wouldn't set too much store by it. Could be 20, could be 2.
But you also want to ask yourself how much you are going to ENJOY those 10 (or 20, or 2) years if you carry on like this. I'm guessing, not a lot.