Because sometimes people who do bad things die before the score can be settled (there's also Plato's doctrine that being a bad person is its own punishment, but he may have just been coping because he knew that his fellow Athenians were never going to be punished for killing his teacher, either in this life or in the next). Alternatively, there are those that would like to see every soul saved, but the idea that wicked people should be taken into heaven without being cured first just doesn't seem right. Either way, the fact that this question is being asked as if the answer isn't obvious (whether you believe in it or not) is bizarre and a testament to the decadence of modern Western "men".
If you're going to quote it in full, at least pull a Nietzsche and quote it in the Latin.
