I'm not saying your hypnotherapist isn't a con man, but hypnotherapy is suprisingly successful when it comes to addictions. II would agree that the goal is to never drink again, and I lost the obsession to drink alcohol by changing my subconscious and changing my thinking towards alcohol.
Hypnotherapy can produce results in changing your subconscious. To paint alcohol addiction as something completly different than any other addiction is short sighted in my opinion. I know it works for some people.