I was told of this story that the management of a private hospital telling their doctors to treat every patient in the hospital as their customer and that wasn't received very well by some of the doctors.
This was the rationalisation given : If I had to treat them so well and important, wouldn't that make me as a doctor being less important, significant in status, qualification than the patients. Well, after all I am the doctor and I am needed to treat them!
Well, I believe everybody has his reason, point to believe what he wants to believe. The perception plays a very important role in shaping one's belief.
If one, be it doctor, lawyer, engineer, accountant, architect, sees oneself as the specialist with the attitude "I definitely know more than you", the service aspect of the job rendered will not be satisfactory. One the other hand, if one carries out the job from "doing business or a businessman" standpoint and has the perception that nothing happens unless something happens at the marketplace, then I believe, the result will be far more satisfactory.