The very phrase acknowledges that work is some intrusive thing that interrupts but is not a part of your life.

Or maybe the rest of your life is an intrusion on your work?

If we can just ruin all of our employees personal lives, they'll have to throw themselves into working 80 hours a week to avoid dealing with the misery that lurks outside of the office!

No way. My personal life is in shambles, but I don't sleep under my desk.

Coincidentally, did you know that there are rules against sleeping under your desk? Its true.