I started by thinking that if we're lucky, we have only one habit / pursuit / recourse; then I started thinking; if by some circumstance the pain ceases, and we continue the habit, does that confirm it's an addiction? Or what if our coping mechanism is something positive, like an art or craft? Addictions are usually implicitly harmful. The two dynamics are sometimes seen at the same time in someone. A writer, etc, might both be doping and turning out profound works literature to deal with his / her inner demons.