It does. I cannot tell you the times another person's eyes have helped me to realise that I might do better to lengthen or shorten a particular section of a story, or perhaps write it differently and to better effect. Better yet, it is always good to hear when someone thinks you've written something particularly well. Reader feedback can help you to see what you're doing correctly and what you are not but also when you have produced an undesired or welcome effect or missed the opportunity to write something much more powerful. Reader feedback is an invaluable and necessary part of developing a writer's confidence and craft (as much so as reading constantly); I suppose it's a sort of paradox then that so many writers are shy of wanting others to read their work.