Our church's biggest outreach is Celebrate Recovery. In fact, on any given Sunday probably 2/3 of our congregation is either recovering addict or part of their family. One of the things we have learned is that even though accepting Christ is far and away the most important step in their recovery, accepting Christ is not the end of their recovery.
Just yesterday I had lunch with a gentleman who is 79 years old and is a recovering cocaine (crack) addict. He used to be a deacon and even did some lay preaching before becoming a drug addict. Last Saturday he found himself in the wrong place with the wrong people and relapsed. The pull that drugs have on these guys is unbelievable. About a year ago I sat in the living room with a young man that I led to the Lord and baptized. He was coming down from a weekend long high, basically the same story, wrong place at the wrong time and he wasn't able to say no. His probation officer kept asking him why he relapsed, and all he could say was, "I don't know. I just couldn't help it"
When you say that addiction is not a disease, it's a sin, you are missing it big time. It is absolutely true that drug abuse is a sin. But once the abuser becomes an addict, the addiction is a physical condition that's just as real as cancer, heart attacks, or any other disease we recognize. It's true that the addiction is the result of sinful behavior. Just like it's true that the heart attack I'll probably have one day is the result of my sin of gluttony. (I love a good cheeseburger).
One of the things I hear over and over in dealing with addicts is that they don't want to go to church because they feel that the people there look down on them. Especially when they still struggle with their addiction after they are saved. We tend to pretend that we've got it all together and that we never struggle with anything, when the reality is that we all struggle with our personal pet sins, it's just that most of ours are not as obvious as their's is.
Next to a relationship with Christ, the best thing an addict can have is the love and support of a church family. Statements like "it's not a disease, it's a sin" build walls that keep people who need our help the most from opening up their lives to us.