drop bear
Sr. Grandmaster
I can't speak for all karate but I do know that when Sosai Mas Oyama was initially spreading Kyokushin he approached some top level Judoka Sensei to join. My understanding is he was quite successful in attracting them and I expect that they would have taught the same Judo techniques as part of the Kyokushin syllabus. Shihan Jon Bluming would be one of the an think of at the top of my head. Shihan Bluming is also a pioneer of blending striking with grappling.
Makes sense to me that GSP would fly in top Thai guys so he could better study the striking of his opponents.
Yeah but karate didn't keep them, sort of.
So for example a MMA school attracts a top grappler in to their system. The grappler, due to his expertise runs the show. Or the other stylists get good enough at that grappling to pass it on.
And then that school has good grapplers.
So local karate school
has good grappling. But they spend enough time on that grappling to get good.