Gary -- nice post. I'm just over 13 years as a Friend of Bill, and like your discussion of what we would and wouldn't do. It all boils down to having that ability to choose -- I lost it for many years, but have had it back for 13. Watching and working with people who kid themselves as to their "ability" to choose keeps me on course.
I guess, looking at it rationally, given that this cancer thing is looking to kill us, why would anyone even engage in the debate over how much alcohol is enough/too much in terms of recurrence? How many spins of the revolver in a Russian Roulette game does it take to blow your head off? Same effect.