Since some of the limitations of the medical model are related to environment and family history, this is a major influence in Marge's drinking. Marge lives in a stressful environment, is raising a family, is diabetic, unemployed, and has a difficult son to raise. Another aspect is that Marge suffers from depression and has a family history of alcoholic illness. It's not that Marge is weak or without willpower, it's the fact that Marge has an illness and needs help to deal with the whole problem, not just the medical part. In order to treat alcoholic illness, one must work on the underlying problems as well as the alcohol use that is used to deal with other problems.