People really lost the idea
The rating isnt based on how bloody or how gory the animation might be. Its about the meaning, effort or thought put into it. This animation, from what i may guess, had a good amount of work put into it. Adding choreography to go along with the music is harder than most people would think. I personally loved it, it doesnt have to be bloody, cuss or kill anybody to amuse me. Good job, its nice to see something clean every once and a while.