I agree, there really isn't anything you can do.
In my experience, I never really saw how bad things were with my AW. I had all sorts of excuses for her behavior. I couldn't accept that anything was wrong until I hit my bottom.
Said to say for enablers the alcoholic is our drug of choice. If we weren't so focused on their problems and issues and covering for them and so-on we might actually have to look at how pitiful our lives had become.
Your friend,