Addiction Versus Choice Analogy

Today I listened to a podcast discussion about the view that addictive behaviour is a free choice versus the consequence of a disorder. I have known a few people who simplistically assert that one always has a free choice in such matters. Without going into that argument and its ramifications as it's been covered extensively elsewhere, I came up with the following analogy to illustrate the associated fallacy: imagine you are being tortured for information; it is your own choice as to whether or not to divulge any. I feel this hypothetical scenario clearly illustrates the basic point that pressure (in the case of addiction it is changes in brain chemistry) can significantly influence the character of the decision making process.