The "writers" column for works is not just for the relationship "writer", and can be confusing in scope. Right now it's for all work rels, but MBS-8328 will limit it to "writing" rels. These are in MusicBrainz under the header "authorship" (was previously "composition" but that's not a good name), meaning the columns and other appearances of "Writers" should probably be renamed to "Authors".