As writers, we wear a variety of hats (that is to say, perform a variety of jobs in the course of creating and selling a story). I usually simplify these down to three: artist, editor, and marketer. Some might also find "artist" better divided into writer + musician + painter + costume designer, or prose-writer + poet.
As we form communities with other writers, we learn how to perform critical/editorial jobs for one another. If this works well, the experience helps sharpen our skills with regard to our own work. Much of the time, someone else's "fresh eyes" offer insights we have not found on our own, yet this arena is still very much an exchange of time and energy and skill among peers. We're learning together, and helping one another improve.
As we form communities with other writers, we learn how to perform critical/editorial jobs for one another. If this works well, the experience helps sharpen our skills with regard to our own work. Much of the time, someone else's "fresh eyes" offer insights we have not found on our own, yet this arena is still very much an exchange of time and energy and skill among peers. We're learning together, and helping one another improve.