Another One Bites the Dust... I Think
There weren't always dragons in the Valley. It was almost always underwater, frozen or uninhabitable for any living species with its toxic fumes—much less dragons. The Valley has always been a wasteland. Actually, it still is, only now there are dragons and, uh, fish. Nobody is sure if that's a good thing or not. Think about it: two living things exist now, which is good. But one of those things is a giant lizard who can wipe you and your whole family out in seconds; that's bad... But they stay in the Valley, which means no one is dinner as long we stay away from the Valley. It works for me; nobody even goes to the Valley unless they have a death wish; I certainly don't, with a bonus of not being dragon food? Sign me up; I volunteer to stay FAR, far away from the Valley. No amount of fish is enough to tempt me.