Might argue with the order, but the top 5 is pretty solid, all should be in the Ky top 10, but no Idle Hour either? I am sure there are several really nice private courses in Lou and N Ky left out as well.
Courses used to have to solicit Golf Digest to review their courses. Here is a synopsis on how the rating process works.
https://www.golfdigest.com/story/how-our-panel-ranks-the-courses