Self will.... based on strength of character. Those strong enough will "self will" themselves to not get addicted to alcohol... or to become un-addicted to alcohol. It's the same thing (to me) with drug addicts. It's not 'genetic'. Too many addicted folks had NOBODY in their family that had been addicts or alcoholics. And...if it was merely genetic ...my mother and uncle would also have been alcoholics. My ex and friends didn't have anyone in their family that were alcoholics that would "explain" why they were. Therefore, the only conclusion is that it was what they chose to do.
Where the spiritual part comes in... is asking for and getting God's help ... when one is not strong enough to kick a habit. At least, that's how I see it. So glad you asked for God's help. That was, quite literally, the first step in your recovery.
The foundation of AA is based in science and moral psychology (spirituality, religion, higher power, metaphysics) Doctors and pastors) Published in 1939, and standing the test of time until present.
I accept the knowledge therein, versus your opinion.
In my experience opinions like yours are often from a bitter spouse or relative. Do you really know very much about AA beliefs? The founders determined their own self will (will power, character,, etc) had not been enough.