This happens in the real world every day. I cant tell you how many times trauma patients have come into the ER with fractures that get repaired regardless of their probability of survival. You just have to do everything you can for the person while they are alive. Last weekend there was a man who came to surgery completely eviscerated from a car wreck. Odds of survival were 100-1 maybe even worse. Honestly I thought he would die on the table. Regardless, we did everything in our power to restore some mobility to his fractured pelvis, arm(s), and femur. Miraculously he is still alive. If every one did the easy thing and facilitated a persons demise there would be no opportunity for miracles to occur. Its just not a human's position to play God.