Do people really need to be told this?
Yes, but the people that need to be told that probably can't act on it on what you tell them. I've been sober since August 29, 2005. I now work in a residential treatment facility. People come to us because alcoholism is a disease, and requires treatment.
Side note: medical science is now pretty clear, all additions effect the same parts of the brain. Even gambling addiction has a similar effect on the pleasure centers. There is a genetic component, which is why I said above that addicts can't act on this information on their own.