One byproduct of writing is editing. If you write something for publication you will eventually come across an editor. Some are good, some are not. The editor who just did my new novella is pretty good. He pointed a few passages that could be stronger and spotted a historical inaccuracy that was easily fixed. I also just had an unpleasant dealing with an editor. He seemed to want to re-write my story into the way he would tell it. Since no contract had been signed I ended up withdrawing the story.
Ask any writer who's been doing this a while and he'll tell you about that editor from hell. It seems to be unavoidable.