The Flying Machine

The Emperor explains to the flier that he fears that an evil man will manipulate the technology and destroy its beauty - for instance using the flying machine to throw rocks down upon the Great Wall of China. The Emperor says to the inventor, "There are times when one must lose a little beauty if one is to keep what little beauty one already has" (2.)

Why is the emperor not justfied for excuting the flyer in a short story the flying machine by ray bradbury