Some critics of Elizabeth Warren say she can't run the Consumer Financial Protection Bureau (CFPB) because she's not ready to lead such a new and important agency. Yes, she has intelligence, passion, and charisma. She still doesn't have experience. As Neil Irwin reported in the Washington Post, the critics wonder whether "Elizabeth Warren will be as effective a bureaucrat as she is as a guest on 'The Daily Show.' " It's a legitimate argument. Or, at least, it would be ... if it were true.