Hmmm. Interesting read. I don't believe that all alcoholics and drug users necessarily binge after just one use-although one use DOES usually provoke further cravings.
I guess the cravings and the obsession and romanticizing about the drug is the "disease". But that does not excuse the individual from any harmful behavior he engages in while he's using, especially when they know the legal and financial consequences. Its up to the individual to make sure that they maintain priorities in life, and to see drug use as selfish and self-defeating. If they can still use occasionally, more power to them. But if they're plagued with cravings and withdrawal, it makes it hard to not eventually begin binging again, which makes the condition disease-like.
Just my thoughts.