I don't think it's a disease, either. Maybe a genetic predisposition, like sunburning or being pigeon-toed, but not a disease.
Not to say that addiction and addressing the associated problems are as easily corrected or avoided, I just can't buy the disease model.
I do think labeling it a disease gives people an excuse to cop out.
My step sister is a major alcoholic. She has lost her husband, her kids, her home, her license, her career (nurse), been hospitalized numerous times and almost died once from alcoholism, jailed several times, had a few DUI's, had a wreck while drunk and almost killed a mother and daughter, her boyfriend is diabetic and an alcoholic and is basically in the same place she is only worse health wise because of being a diabetic alcoholic. Oh, she is a also a compulsive liar. I predict she will drink herself to death just like her mother (my step dad's ex wife). She is not a functioning alcoholic but her sister is (my other step sister). My step dad also had an alcohol problem, mainly when I was in middle and high school.
My dad (my real dad) is a functioning alcoholic, my brother died of a methadone overdose, my other brother is addicted to gambling to the point of filing for bankruptcy several years ago because of it and now being $60k in debt again, I also think he is addicted to hydrocodone. My mom used to smoke but that is the only addiction she has/had. I haven't been addicted to anything. I often wonder why I'm not an addict, I have been surrounded by it my whole life.
My mom's friend is a recovering alcoholic. She goes to AA meetings all the time (my step sister goes infrequently to the same meetings). The majority of my moms friend's friends are in AA so my mom and I know quite a few of them. One time my mom, me, my moms friend and other AA people went to lunch. We were discussing alcoholism. I was talking about how I can't comprehend addiction because I've never been addicted. One of the AA people asked me why I drink at all if I'm not drinking to get drunk and how I can stop at just one glass of wine or beer. She said she can't understand why anyone would have a drink if they didn't want to get drunk. I can't understand the NEED to drink yet she can't understand not needing to drink.
My mom's friend hasn't had a drink in about 5 years but she has just traded alcoholism for shopping. She blows through money and buys more crap than anyone I have ever known. She is also a semi hoarder as well as has issues with food. What I don't understand is why if she beat her alcoholism (so far) what is feeding her other addictions?
What feeds the addiction? Is it a defect in their personality? Is it a learned behavior? What causes the "defect"? Are they just weak?