On M*A*S*H* Captain Pierce was made Chief Surgeon over Major Burns and Major Houlahan and Captain Blake because sometimes when treating a patient there is a choice, there is more than one possible treatment or more than one possible surgery available to fix/cure the patient, and the medical staff could be in a disagreement. Someone has to have the final say, and lets remember the Doctor blew a gasket when he couldn't decide on saving that pretty girl or Harry Kim. Wouldn't it be nice if there was some one with a soul to tell the Doctor "No, that's way too risky, we are not going to do that." sometimes?
Going to medical school is not just about learning the craft, its about learning ethics, and learning responsibility and learning failure. Every surgery is a possible Kobayashi Maru. And besides anytime someone says "Delete Ethical subroutines" the EMH transforms from Doctor Kildare to Doctor Mengele. Ocampas go crazy too with their wackadoodle hormones, but they get sweaty, so you know when to avoid these two women with with a scalpel.
The Doctors intepersonal subroutines were designed by the king of cool Reg freaking Barclay, which is even more over compensation to deal scorn from being a loser. A bald loser. The EMH is a powder keg of neuroses that is going to explode at some point, and barely sees patients as more than meat sacks in season one. Actual life experience, rounded off those rough edges.
Oh? Did Reg accidentally pass on his Holoaddiction to the Doctor?