All businesses operate with some form of government interference. It's called regulation. Differnet businesses operate under different levels of regulation and liscencing. Doctors and pharmacists must be liscenced to practice in their respective states. If the regulations state how a prescription is to be filled, the pharmacist must follow the regulations or risk losing their liscence. Based on your arguement, that businesses should be free from government interference means that you are advocating that doctors and pharmacists do not need to meet any requirements to practice their profession. They do not need to go to school. They do not need to pass state liscencing exams in order to prove they are competent. You are technically advocating anarchy in the profesisonal realm where anyone can hagn up a shingle and do business. That would be a very scarey place to live.
Scary? C'mon, doc. There are plenty of services that do not require government licensing. They operate on the quality of their work and would lose business or get sued for fraud were they to provide a poor quality product. You do not need the government regulating every darn service out there. The private sector can do just as good a job. Take Underwriters Laboraties, for example.