Well, today at least.
Creativity is required to have self-confidence in your work. Without it, you probably just won't make anything. And if you do, it won't be something you are incredibly proud of. However, once you have creativity you will actually WANT to do work. When you have that grand idea, all you want to do is just that and not be bothered by other little things...like eating or sleeping. Hey, if the idea is great enough, I might even skip a meal [food is a great passion of mind]. But once that creativity is flowing and you create work you are proud of, you want to make more. And of course your confidence is boosted.
Creativity à Self-confidence.
Took me 4 1/2 years of college but I finally found the key.