The Minute Clinic could arguably be a entity that has already proven its worthiness perhaps for instance because it is for one very close to the customers because they have so many clinics throughout the US that it makes it quite convenient for the patients that need there medication and cannot travel far.
While the quality and quantity of care available at MinuteClinic is quite limited, it has its place in the medical market. If you have access to a primary care physician, then you do have a doctor to go to. But there is a segment of the market that needs quick and cheap health care from time to time. If the clinic staff is capable of handling these patients, and these patients seek this sort of care, why ban this type of outlet?