Two important comments. One, if all patients at the end of life were treated this way, no one would seek Kevorkian. If the answer is the patient, then there always will be someone who is not getting enough. If the answer is the doctor, or for that matter, any health care deliverer, then we will have the same result. This is just human nature.
Human freedom has life as a necessary condition.
This experience, when shared with loved ones, also can enrich their lives, especially if they are supportive of the dying person living through the death. Accept for the moment that physician-assisted suicide is killing. I think the above few paragraphs represent a reasonable critique of physician-assisted suicide, but a highly personal one, based either on deeply held religious views or some other set of deeply held principles about the nature and meaning of life and suffering. But again, such views are so profoundly personal that they likely are to be disputed and unlikely to be shared. Thus, they are shaky grounds for legislation or professional regulation.