'Kay guys, I have a dilemma (!spoiler alert!). In the Eon Chronicles, the Evil Overlord™ is after the titular books in which is recorded all known information on the Latian race (Latians being Latios and Latias). Anyone who has all of said books gains access to all of the secrets of the Latians and therefore gains the ability to control them.
Now obviously, the Latias and Latios that the story centers on are journeying with their companions in order to recover the Chronicles before the Evil Overlord™ does. Along the way, they meet this guy who basically says "hey! If the Evil Overlord™ ends up getting the books before you, gains control of you, and turns you into evil killing machines/dark minions/living rave parties, that would be really bad! So why don't I just kill you right now and rob him/her/it of any possible chance of doing so?"
And my characters' reply? "...You know, you have a point there."
So I need some reason for these dragons to exist despite the fact that they may ultimately end up destroying the planet/killing a lot of people/becoming the new hit sensation. What kind of quality would make them worth keeping around?