Not only that, but the more I've read the blogs of professional writers, the more convinced I am that's NOT what I want to do.

I like the writing part, but not submissions and rejections, page proofs, or any of the business aspects.

If you haven't seen, matociquala had a good entry recently about fanfic. Do people tell every Joe twiddling with a guitar to become a professional musician? Folks can enjoy cooking without becoming chefs, why can't I just enjoy writing as a hobby for fun?