You are not an alcoholic or an addict. You are not incurably diseased. You have merely become dependent on substances or addictive behavior to cope with underlying conditions that you are now going to heal, at which time your dependency will cease completely and forever.
Only discovering and healing the root causes of each individual's dependency puts an end to dependency. One-on-one sessions are key because the individual issues at the core of dependency are just that- completely individual.