I am searching for an old sci-fi short story, likely published in an anthology circa the 50s or 60s.
From what I can recall, a doctor is speculating about one of his patients. The patient experiences some surgeries he cannot remember. The surgeries are helpful, as they were fixing the health issues, but distressed the patient due to the lack of memory/consent. At the end, I believe the patient was lobotomized to "fix the distress". The doctor speculated that it was a robotic surgeon, rolling silently through the night. The twist being that the helpful robot tried to improve the patient's health, but ended up doing more harm than good and felt that a lobotomy solved the final problem.