I think the reason why some people are like that is because they either feel, or believe that their craft is perfect and they don't want to be critiqued, or have their ego challenged for whatever reason. I have been writing since I was 11 or 12, and I'm 29 now... giving me 17 or 18 years of experience with writing and tweaking things here and there. I started writing with what you see, but there was a whole bunch of holes in it. I then went to writing in a play format, and I finally decided to try and get back into what you see now with my writing. Everything that I'm doing, I chalk it up to a work in progress that is always open to fixing, interpretation, ect. And that's how I see where I am now.