Because God loves a trier.
Everybody loves the underdog.
And I hate that darned Roadrunner!
Forget Hamlet, Oedipus or Willy Loman: I'm willing to argue that Wile E. Coyote is the greatest tragic hero ever created. He's cunning, he's ingenious, he's hilarious, he's doggedly determined... he's wily... yet he's destined to never find true happiness. He is my favourite cartoon character, Chuck Jones' greatest creation... and yes, he is a genius.
He also provided the inspiration for what's possibly the most moving comic book I've ever read. Animal Man #5, 'The Coyote Gospel', by Grant Morrison and Chas Truog. If you've never read it... do yourself a big favour.
As a writer, I take my inspiration from Wile E. Coyote. After every rejection letter, every knockback, every failure, I always ask myself WWWED? He'd pick himself up, dust himself off... and get back to work. Now excuse me, I've got a Roadrunner to catch...