That's not what the author said, though. He said what you quoted, which supports his point about feeling justified (instead of guilty) when taking vacations.
He didn't say "take a vacation so you can work better."
Agreed. It's an unfortunate artifact of some people's personalities. I'm planning a vacation for a few months from now, and I feel guilty about taking an extra day. Forcing myself to ignore that.
He didn't say "take a vacation so you can work better."