Why do MMA and BJJ think they know CACC?

Because how many "pure" CACC guys are there? Of those, how many are an active part of the internet community?

The BJJ and MMA communities are going to be the ones that contact CACC, mostly in the form of the Japanese hybrid wrestling scene from the early-mid 1990's. Who outside of MMA claims CACC as a competitor? Josh Barnett is the only guy on the big scene really waving the Catch banner right now. Prior to that, it was Kazushi Sakuraba, Masakatsu Funaki, the Shamrock brothers (to a degree, though they mostly called it "submission fighting" if I recall), maybe Erik Paulson (though he, too, is a hybrid). On local levels, you have guys who are essentially trying to re-create CACC as a sport from scratch, but that hasn't produced any top competitors in the overall grappling world.

Personally, I have historical instruction manuals, books on CACC and wrestling history, and instructionals by Japanese and Western exponents of Catch. Even visited a Catch gym in NC, and have a coach certification in a system with a Catch influence. Personally, I don't see myself as a "Catch" guy any more than a "BJJ" guy or a "karate" guy or a "boxing" guy or whatever. But, because I also study BJJ, because I train in an MMA format, maybe YOU might see me as one of those "guys". Studying MMA or BJJ doesn't exclude the study of Catch though, right?

wrestling and bjj is probably the best for your ground game. In wrestling you've got take downs, throws, take down defense, and a very good base once the fight goes to the ground. And then with BJJ you have all the submissions you can think off, and even more positioning. Very good combination of styles to create a very good ground game.

Huge crossover of techniques, I would imagine. I mean...the longer you grapple the clearer it becomes that grappling is grappling. Fundamentals don't change. Body mechanics don't change. The only reason the sports are so different is because of different rulesets. A double wristlock is a kimura is an ude garami and so on. So BJJ guys probably feel fine talking about CACC stuff because they know that a lot of their stuff still applies.

kimura!?!? you mean double wrist lock?