Whoever would write books? It's suffering as well as greatly satisfying. And certainly there's suffering in the sense that you don't know for a long time how to do it.
I remember I had had one woman who had three or four kids, and some of them were having problems. I said, 'Maybe you could go write somewhere else, away from your house.' And sure enough, all kinds of wonderful stuff emerged. She was keeping too much charge of herself because she couldn't stop being a mother when she was in the house. You have to find your own way of letting loose, if you're one of those people.
Telling someone to be confident in the abstract is not going to make it easier for the unconfident writer to actually get herself or himself to the point of being able to put in the upsetting stuff.
This is true in other fields, too, that a legal aid lawyer gets a whole lot less money than a Hollywood lawyer who handles the estates of celebrities. Maybe the legal aid lawyer is doing something better, though, and maybe they're happier. It's not a completely unheard of idea, but I do think we have to remind ourselves at times to look for satisfaction in other ways.