Well as an oncologist, I respectfully disagree. Cancer is maladaptive and there is no natural benefit nor is it something that should be in the body. I would say, philosophically, that the course nature takes is that the response the body gives from such a maladaptive disease. Giving treament, with proper caution isn't playing God, its being a physician. When referring to God I am talking about a physician serving as the sustainer of life and bringer of death. It is my job as a physician to provide the best medical therapy for the patient. Kavorkians thought on playing God when it comes to medicine just merely justifies his reasons for killing his patience.
Physicians shouldn't decide whether who lives and dies. I believe this will stigmatize our job. I believe in dealing with right to death issues there are gray areas as to who performs such procedures. Mentally I just couldn't bring myself to inject someone with sodium thiopental, Pavulon (also known as Pancuronium Bromide) and Potassium Chloride. Even though they were suffering to be the bringer of death is something that would psychologically effect me.