Heroic people take risks to themselves to help others. There's nothing heroic about accepting $5 million to go out and run around chasing a ball, although you may show fortitude or those other qualities while you do it.
“A movie star is someone people look at and go, 'I want to be like that person'. There's the responsibility of desire. It's not something I'm interested in trying. I would fail miserably at it, so why even bother?”