Form follows function
In response to your question #2: I submit for your consideration that the AA program is not designed to answer deep universal questions about the nature of God and the moral theology of free will. What it is designed to do (IMHO) is answer the questions: How do I find the power to stop drinking and how do I live in my own skin once I do?
One does not use a microscope to study astronomy.
As far as question #1 goes, the AA program teaches simplicity. The fact that a lot of us needlessly complicate it indicates our need for more practice. Fortunately, the practice can be a good deal of fun.
Rule 52: Don't take yourself too damn seriously!