I believe the author's intent was (or should have been) to describe how THEY wanted to receive communication, not how EVERYONE should.
A skilled communicator will craft their message for the audience. Some want "just the facts" with no social lubricant. Others want the banter to build person-to-person relationships. Some want a quick statement of context for everything. If you can adjust the message to the audience you will be more successful at working with them.
I have begun including "how I want you to communicate with me" as part of my standard "introduce myself to new team members" talk.