I understand that Charlie Wilson thought that Tom Selleck would have been a better choice to play him than Tom Hanks in "Charlie Wilson's War". Was this because

I understand that Charlie Wilson thought that Tom Selleck would have been a better choice to play him than Tom Hanks in "Charlie Wilson's War". Was this because Selleck is or looks taller? Or so people didn't mix it up with all the other movies that Hanks is in? Only so many get movies made about them while they are alive, no? I guess there was Cliff Robertson playing the young JFK in "PT-109". But I'm not that much of a moviegoer.