With a success rate of only five out of a hundred, Joyce's behaviors were not atypical. Dr. Now impresses with his ability to be firm, while not losing it with these patients, but he knows it will only make most more rebellious. They don't want to hear NO.
It's like the alcoholic who comes in with a GI bleed, vomiting frank blood, all the way into the ER. They successfully go through treatment and detox. What do they do on their way home? They stop at the liquor store. Fear of death does not override their desire to self medicate.
Addictions destroy all that matters to the rest of us. Relationships, family, work and mostly health. But, having worked detox, I grew to see it as a self loathing, slow death by choice, more than denial of its severity.