you are not powerless over your own consumption of alcohol, we get that, but you ARE powerless over alcohol itself, as in it's effects on others, it doesn't matter who drinks it, you are powerless over the "entity" alcohol, it's just your own consumption isn't an issue.
IMO feel free to put "We admitted we were powerless over A)_____________, and that our lives had become unmanageable"
A) People, places, things, situations, and other peoples consumption of alcohol
That's basically what I do in my head anyway in my "alanon" version of the steps