Essentially: it’s not designed as a change from North/East/South/West, it’s designed as a from-scratch way to refer to those directions.

The sun rises in the East and sets in the West, so let’s say East is “Sun” and West is “Setting-Sun.”

Polaris/The North Star is in the North, so let’s call that direction “Star” and the other direction “No-Star.”

When you say “Setting-Sun-Sun-Star,” you’re saying the direction is more similar to the path the sun takes through the sky than it is to the North Star, and in the direction the sun sets.