Fear? Are you kidding?
Learning more than you thought you knew or could competently manage, is the price of failure. So I learn more from failure; however, I'm not afraid of the act, only the monetary cost. Yet, I am not a slave to materialism either. Materialism is a bargain compared to the price of success. I think the photographers that I have known, since I started taking pictures (in VietNam) in 1969, have, by-and-large enjoyed both. When you get to the top of any professional heap, as I did in 1989, you might fear failure more because you have farther to fall. Do you fear failure as a person or a photographer? Fear for yourself? Or your reputation as a craftsman? Have you, in fact, nothing better to do than fear your failure or success? But lest we fear to face the facts:
"Fear is the mind-killer." Frank Herbert, Dune.
"Work is the Curse of the Failure Class." (Robert Chapman, 2008)