Why We Care About Natalie Portman's Dancing, Or Lack Thereof

First, Natalie Portman's dance double Sarah Lane complained about not getting enough credit for her work on Black Swan. Then Benjamin Millepied stepped up to defend Portman's dancing prowess. Then Fox Searchlight did. Now Darren Aronofsky has. All these defenses raise a question: why do we care how much Portman danced? » 3/29/11 6:26pm 3/29/11 6:26pm