She's not. She's as artificial as all the rest of them. Every aspect of her life is stage-managed to maximize her media exposure; this story was intentionally leaked by her own "people".
I have a friend who works in a local TV newsroom, and one day last year he was called to be "alerted" that she and Affleck were making a "spontaneous" trip to a nearby mall to show how much in love they were and that she wasn't too good to hang out with the little people.
Just because they did a planned event, doesn't mean that she's not real. I hate that she likes Martha Stewart, but she did cut that great recruitment video for the CIA, and she hosted the young inventors awards a year or two ago.