I will say that I've felt that thankfulness, but only after working the steps. Mainly because I've finally begun healing from lifelong tendencies toward codependency/anxiety/doormat-ism. These traits were there long before my A entered the scene, and I don't believe that I would have entered the doors and sought recovery until the chaos of alcoholism forced me to.
But when I first started, I seriously thought those members were nuts. But interestingly, I found them the most serene... So I was curious and stayed.