No, you don't and you apparently fail at text comprehension too. I have merely stated that spinning techniques do exist and that I find the animation okay for a critical hit or fancy finish. It bothers me much less than bikini armor and other abominations we see so often.
I looked up a bit about this, and found an interesting defense of it.
In general spinning in combat, martial arts and sports however is pretty terrible. It does not add that much power and has a lot of drawbacks. His argument roots on eastern combat sports using it a lot, but those are known to carry ineffective techniques out of tradition.
The concept of spinning for power moves seems however to be slightly less bullshit than I thought.