Sometimes an opinion on something like that can change, for what may turn out to be very personal reasons. You never know.
I never liked that part in the movie. Then the day came when my elderly father, whom I was very close to, started coughing up brown blood. I rushed him to the hospital. They couldn't find anything in the initial examination, but were going to do more. He begged me to just take him home. I gave in. That was on a Tuesday. On Sunday, he passed away. Peacefully, in his own home as he had always wanted, and with me at his side.
But something like that is a hell of a quandary. Not exactly like McCoy's situation, but it sure made me appreciate that scene.