I'm with your sponsor on this. The why is irrelevant in most cases. There is nothing wrong with looking at ourselves outside of AA - I am a proponent of therapy - I had worked with one for 10 years while I drank and while all the self-knowledge in the world was good, it didn't stop me from drinking. Karl Jung knew this too.
It's like going through a fatal 5 car pileup and trying to figure out what radio station was on before the crash. Who cares? Irrelevant. Things will come up in the inventory, absolutely. I found that the important stuff came up there. But in terms of digging into family history etc...what will that serve other than a good genealogical hunt? Whether or not my great-grandfather was or wasn't an alcoholic won't shed any light on what I am doing now.
You sound very enthusiastic, which is awesome...just don't get stuck in the why's when you can just motor along in the step work and live in the now
