Studying about the fight between Royce Gracie and Hidehiko Yoshida, a Japanese judoka and a gold-medalist, I found out that Yoshida had never trained Ne waza before fighting Royce because he thought it required a lot of energy.
“In my judo days, I didn’t train ne-waza at all. It required a lot of energy.”
The thing is along with the CACC (to some extent) there is an insistence from the Judo community that BJJ has never presented anything different compared to these martial arts.
If I also disagree with the CACC at this point, it is because I doubt that this martial art emphasized sub-missions, and instead saw them only as a means of achieving a pin.