Peter Lohmann explains how unclear task ownership creates chaos: multiple people claim the same work, or no one does it at all. The fix is assigning exactly one owner to every task and documenting the procedure. This prevents dropped work and lets people actually take time off.
Before it existed, nobody knew who did what. You'd end up with 2 people both thinking they own the same task, or even worse, a task that nobody owns, and it just became a big mess. Stuff gets dropped, you hear, that's not my job, and everybody does the same thing a little differently, so the quality was all over the place. It was chaos. You can't take a day off with that kind of chaos hanging over you, let alone a month. And you can't take a day off with that kind of chaos in your business, let alone a month. Real accountability is what lets you leave. If every task has exactly one owner and a written way to do it, the work doesn't stop just because you're there to chase it.
