I don't care about the rest of the argument between you two. But this point right here I have to address.
1) I'm going to grant you the benefit of the doubt in the above, it could be argued but its irrelevant to the next point that is more important.
2) What TCMA has done 2000, 1000, 50, 10, 5 years ago means absolutely nothing. If it is not viable TODAY, then it will die. That is simple and basic adaptation. This is where it is failing quite miserably. Its been years now that people have been shouting that MMA is a fad. No, its here to stay. That is reality. The nature of self defense is changing, that is reality. Either TCMA (or any other TMA for that matter) changes or it goes extinct.
Evolution trends toward the most efficient use of energy output vs gain. Dogmatically clinging to the energetically inefficient (low probability) techniques for the simple sake of tradition, does not produce positive fitness. Even if by some chance, some exceptional few, can make them work...that's still simply an example of specialization. Want to know what happens in nature to specialists? They get out competed by the generalists that can occupy any niche. Well not any, but you get the idea.
This isn't just an issue of TMA. Its rampant in politics, morals, religion...you name it.
TDLR: Either it works TODAY, demonstrably so, or it dies. End of story. Right now, its dying. And that's a shame, because as someone who also studied northern mantis as my first style of martial arts, it was fun. For a time. But there's a very obvious flaw in TCMA. And very very few are addressing it.