Because the book is plastered with the author's as well as the publisher's name....

navigate8310 on April 21, 2025 | parent | context | favorite | on: Pope Francis has died

Because the book is plastered with the author's as well as the publisher's name. Their separation is easily comprehensible. Whereas when an orator delivers, the separation of the writer is not so apparent. It is automatically assumed the orator is the writer.