Not really the point I’m making. Plenty of successful photographers have become successful by taking interesting photos, not by being a technical wizard of their camera.
Still not really my point. Leibowitz is a good example. Certainly she knows how to use a camera, but she is mostly famous because of her subject matter: celebrities. She took John Lennon’s photo five hours before he was killed.
That's a great quote but you have to remember that he said it a long time ago, long before the advent of digital photography. It's more like "Your first million photographs are your worst" now.