I know in my case, there were times when I was an active addict where I didn't really have free choice, because it was not a choice to drink, it was an automatic impulse. There was no frontal lobe intervention or thought or decision involved, just an urge and a reaction - go to store, buy alcohol, drink. That's one of the puzzling things about addiction, powerful primitive parts of our brains like the amygdala are involved and override rational thoughts and decision making processes. Sometimes we just can't say no, because the question and decision never really arises where we have an opportunity to say yes or no. It still puzzles me years later how that all worked, but it was what it was.