The reason for this is that most people (pretty much regardless of profession) are biologically incapable of creativity. Neither intelligence nor ambition can

The reason for this is that most people (pretty much regardless of profession) are biologically incapable of creativity. Neither intelligence nor ambition can substitute for it. You either have it, or you don't - and if you don't, you can't even conceive of what creativity is. You will see all sorts of not-even-wrong essays explaining creativity, written by people who have none, and don't believe that they are missing anything.