I think I've fallen in love with you, Mrs. Mark.
Mr. Mark is a very lucky man.
As you've noted, doctors are agents of our government. Our government requires that we go to doctors instead of treating ourselves or each other. "Practicing medicine" without government permission is a illegally prohibited, "illegally" because the Constitution does not give our government permission to infringe upon our right to protect our health in the way we see fit.
Government control of health services also explains why medical expenses have gone beyond reach of ordinary people. Nowadays, nobody can afford to have a medical problem if they don't have insurance, because the artificial controls our government has imposed on health services, combined with governmental prohibiting of "practicing" medicine by lay people, have driven costs beyond what we can pay.
Yeah, No kidding. I'm sick of the USDA inpecting my meat for me. What gives them the right? It's not in the Constitution. It's my right to inpect my own meat.