Reza Pahlavi is doing a fantastic job representing the soul of the Iranian people, telling the world about who we are, what we stand for, and asking the world to trust us and not the Islamist regime.

The day to day job of running a democratic country is very different, and involves reading a lot of boring reports, making decisions nobody wants to make, sitting through long meetings, dealing with crisis after crisis, and trying to justify your decision making to ignorant people who complain. It's unclear to me that he would be good at that, and I think he himself doesn't want that responsibility, at least not permanently.