The one thing that I might add, that addiction is physiological and as such is easy to get through, very tough if you are an alcoholic or a drug user, but relatively short lived, a matter of weeks. The habit of drinking , smoking and drug taking is the hardest to crack, although for some like me, a matter of weeks with a fake ciggy, but years for some, in the end it's just a habit that your breaking not an addiction.
i do see where you are coming from with your views,
but having a brother who went from being dependant upon smack, coke etc to being dependant upon methodone, and spending many years stealing pain killers from our arthritic ridden mother, seeing her suffer daily, and decimating my record collection etc.
i think some people are just too weak willed to be arsed changing, even at the expense of the ones they love.