You're really comparing the availability of a fleet minimally skilled servers and a moderately skilled line cooks, to a single medical doctor's appointment?
As a matter of fact yes, I am. I am unmoved by your implicit appeal to supply and demand.
I am also expressing a complete and utter lack of sympathy for their inability to respect patients' time. A doctor refusing to schedule me in the near term because he knows he can't fit me in is an unfortunate artifact of an inefficient healthcare system. But a doctor who knows this and still tries to fit me in - just so he can make me waste the better part of a morning waiting for an "appointment" and not even sit down when he finally does make it to see me - is entirely responsible for wasting my time.
Plus, it's well known that the supply of doctors is artificially restricted by the limited number of residency slots available each year. I can't have much sympathy on lack of doctors until the industry does something to stop strangling their own supply.