I completely agree with the message that people-helping people is super effective. But I'd like to point out that one of the core tenants of AA is to surrender to a higher power. I'm not advocating in favor of religion. But rather highlighting that maybe people who accept 'surrender' of their own will are more likely to get better. There's something to the concept that seems powerful. Anecdotally, I've known someone…
We can't effectively say for certain whether there's a correlation with throwing in a higher power or just group therapy on its own in this circumstance, and I know for a fact there are many that will not join an "* Anonymous" group because of the more religious overtones. This creates a dichotomy that is hard to separate when talking about groups like AA, as it reinforces the thought that their process is important over the comradarie and support of a shared experience.