Fiction vs. Non-Fiction

I've read many articles and blogs full of desperation and discouragement by fiction writers. Why are they in so much despair, even if they've been published? I don't see the same attitude in businesspeople who write non-fiction books.

After much thought, this is what I've concluded: fiction writers want to do it for a living so they're incredibly disheartened when they can't achieve that, but businesspeople see their book as just one aspect of their professional life. A savvy non-fiction writer enters the process knowing that the book is their calling card more than their gravy train, but fiction writers see it as a step to a fully creative life. And what makes it worse is that non-fiction is easier to write and there are plenty of opportunities to publish it, but fiction is difficult to write and even more difficult to get published.

The goals are different: a fiction writer wants to be what he or she creates, but a non-fiction writer is more than what he or she creates.