To me, Keegan misses out on the art of photography and is focusing more on the "rules" of photography.
That being said, it's fun to see where photos fall in its grading system, even if I personally disagree with it.
For example, this portrait by Vivian Maier gets a 4.2 https://keegan.regaind.io/p/9VJdlageRTusSf7Z2qDQPA