Contrast that with what happens when a book is enthusiastically recommended to anyone. The question of "who wrote it?" paints a creative persona with details about gender, race, nationality, childhood, life story, life span, regional experience, class, politics. Expressed appreciation might extend to the book’s authentic atmosphere crafted by a mastery of language, character, genre cred, ear for dialogue, and clarity of message that all together earn that writer the reputation for ability to dial directly into universal truths.
Any kind of writer -- dead and buried -- or alive and writing, can "like" McLuhan, "friend" Gutenberg and become easy to discover via personal websites, genre driven blogs, mashup videos and show up on you-name-it social media to attract not only readers but loyal admirers. Why not screenwriters?