Writing is a form of talking, although writing is such an odd thing in and of itself. People go about it in such different ways.
You can ask yourself, if a film makes a claim, is the claim true or false? Having said that, a style of presenting material doesn't guarantee truth. There's this crazy idea that somehow you pick a style, and by virtue of picking the style, you've provided something that is more truthful. It's as if you imagine that changing the font on a sentence you write makes it more truthful.
I never intended to be a documentary filmmaker. I think I became a documentary filmmaker because I had trouble writing, and I had trouble finishing things.
I envy certain writers, because there are writers who do go into a kind of different zone, where the writing isn't controlled anymore.