Lying may undermine the trust necessary in fiduciary relations. To fulfill her special professional obligations to the clients the professional must ensure that she deserves the trust. If the relationship is fiduciary, the professional pledges to protect only those interests for the protection of which the relationship exists. A patient's interest in the truth . He seems to neglect conceptual differences between lying and deception.
Doctors ought to deceive.
Deception is good for the patients. Most patients do not need to know the truth. Most are incapable of receiving the truth. A fundamental 'default' position is that we must tell the truth. There is the general obligation of veracity and general presumption against lying and deception.