On the contrary, I write because I don't talk so well. When I try to explain an idea in person, it usually comes out jumbled and half-formed. In contrast, when I sit down to write it out, it becomes much more clear on both sides of the conversation, even if it sounds a bit robotic.

Many people I know are exceptionally good at talking precisely and at length about their interests. Sometimes I envy them. I've always wished I could spin out my thoughts at their speed. But I don't really think in sentences. Many of my ideas exist in a sort of impressionistic cloud that takes a lot of energy to translate into conversation. In that sense, writing is as much a form of physical thought as it is a tool of idea dissemenation.

Nonetheless, it's an interesting exercise to record a first draft of a long essay into a microphone and mine it for intersting bits of prose. I should really try it more often!