I've heard from far, far too many addicts in recovery that they started their path of recovery when they chose to stop consuming substances. The same can be said about the folks I know in my groups (I go to Nar-Anon) -- they began their recovery when they chose to do change their attitudes and stop consuming the lives of others.
I, for one, am not claiming that addiction is NOT an illness (and I get the sense that Interrupted is not doing so either), but there is a difference and that difference is choice. No one chooses to be an addict (of substances, gambling, people, etc.), but for the vast majority of folks who have spoken up about their RECOVERY, it seems that the unifying thread is choice.