Why else would people be hanging out in those rooms for over 70 years, it works without a doubt.
It takes a lot of work though, 1-2 meeting is not a cure. People who listen to others go to lots of meeting, 90 in 90 days, do the steps and get a sponsor have amazing results. Its not the only answer and others find excellent recovery in other ways this is true, but it does work. Its also free!