Mediterranean Diet, health and medicine homework help

This is a discussion question in my class that needs to be answer with at least 200 words.

The Mediterranean Diet is probably the most comprehensive diet in terms of quality nutrients in most of the foods consumed in this diet. If this is the miracle diet that can reverse the trend of obesity and related health problems associated with obesity, why is this diet not pushed by our government in schools or for general public? Why do you think fad diets are more popular than the Mediterranean Diet?