I feel I do my best work when it's all there on the page and I feel that the character is very vivid as I read the script and I'm not having to create stuff and trying to cobble together something. If I have to do that then I don't entirely trust what I'm doing.
It's a good question because a movie isn't good or bad based on its politics. It's usually good or bad for other reasons though you might agree or disagree with its politics.
