From Animondays a article about creative currency.
"To develop a pitch is to develop your voice as a writer and an artist. Even being strung along by an insincere development executive (no, they are not all insincere) doesn't change the fact that you created something that you may take with you to greener pastures."
"I share this story because I think it's evidence that pitching is only a waste of time when you choose to pin all your hopes on one idea or on one particular opportunity or executive."
"I have come to believe that development executives will always let you down; not that they intend to but there's just no way they could ever be as excited about your project as you are. And in turn, most creators they strike deals with probably disappoint the executives since it's got to be tough to live up to what an exec might imagine your project to be before it's made.In the end, it's up to you to make sure that pitching isn't a waste of time. All your efforts travel with you and build up your creative currency over time. "