While some may not agree with how this is formulated, I think the point is a part of a bigger concept - don't be unpredictable. Don't make things unpredictable.

Work is a necessity. We're not all neurotypical, relaxed, outgoing persons - some of us may even suffer from mental issues - and we still have to work. Predictability - i.e. removing all the mystery from communication - helps a lot.

"Hey, can you talk for a second?" - is unpredictable. I have no way of knowing whether you want to talk to me about weather or shoot me with a gun. "Hey, can you talk for a second about X? [+additional info if needed]" - is predictable and gives me a clear idea about what you want to talk about.

Of course, communication takes effort, and it is unreasonable to demand everyone to follow these guidelines all the time. But that doesn't mean they're bad guidelines.