[amfarrell617]

He still is responsible for the team that wrote it.

[serf]

a publisher is responsible for a book, but the credit of the thing is poured onto the author.

why?

[navigate8310]

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.