Maybe what I'm really looking for is something to strip away the illusion of control the human race so loves to pretend to have. I have no data to back it up, but I maintain that humans are better for having something bigger and more awesome than themselves to envy. As a species we drive harder when we're challenged. And having a dragon eating your sheep and burning your neighborhood might qualify as challenging.
Dragons have good qualities, too. Some of them bear incredible wisdom and are invested in helping humans. The fun would come in trying to parse out which dragon was which. I don't know. I'm not sure I can fully explain why it would matter to me that dragons made it across the threshold from myth to real. Only that I'd love to see one with my own eyes and experience the shiver that would come from watching a majestic, enormous apex predator claim the skies of this world.
Given the forces arrayed against humans - hurricanes, tornadoes, earthquake, volcanoes and the other assorted ways the planet has to kill us, do you suppose we already have dragons of a sort?