There's a line in Geoff Johns Green Lantern.

"I hear they never never leave their home planet. They're born there and they're buried there"

"Total backwater star system"

"Is it true Kilowog? Is this Green Lantern an Earthman?"

"Worse, he's an American"

Alien races looking down on Earth is a common trope in science fiction. While Earth is certainly less advanced than the alien planets we see in the more Sci-fi oriented DC Comics, the fact that the universe has been saved hundreds of times by superheroes such as Superman as well as the greatest Green Lantern is considered to be Hal Jordan, an Earthman, it would make more sense that Earth was revered by other races.