People prefer to remain naive about the twisted things nature can create. The unfortunate creatures that this procedure terminates are not happy bouncing babies. Often they're already dead. And, those that still have a pulse, even if they could survive outside the womb, would not lead healthy lives. They may only be able to survive as long as they're hooked to machines. They're deformed and braindamaged. I believe it is more moral not to risk the life of the healthy mother (who can go on to later have healthy children) just to (possibly) prolong the suffering of a monsterous mistake.
