There are plenty in MMA or real combative sports yes.. the difference they don't last long. Their students fight/compete and they get trounced.. the gym closes shortly after cause everyone going there realizes they can't break an egg.
In TMAs they don't do anything but dance and talk so these guys turn out 400 black belts, end up in Martial Arts magazine and guys like you are name dropping them like they can actually fight.
Dude, you asked for where and how TMA's prove their worth, specifically internal martial arts. I brought up Lei Tai. You shut down our discourse by saying Lei Tai doesn't count. As a prerequisite to engage in reasoned discourse with you, one must accept that MMA is the be all end all system of self defense. So, remind me again, which one of us is in a cult?