I mean, first, almost all writers these days teach because they don't make enough money publishing to live on, to support themselves - people like Tobias Wolff, Anne Beattie, Amy Hempel, Stuart Dybek; a lot of short story writers, for one thing.
After I did nine years of a television series, I didn't want to do anything really that involved going to a set and being in front of a camera for quite a while. And when I did start to want to do things, I wanted to focus more on film.