I agree that it's a false dichotomy. The question isn't really "traditional v. MMA," though there are plenty of people in both camp who feel that it is. But, as someone who appreciates the technical approach of one and the value system of the other, I don't see that. I see a call for proof of concept. "Show me." It FEELS like an attack on traditional martial arts because it's out of keeping with the hierarchical nature of Confucian-based societies perhaps. It's much more of a skepticism-based approach. But that's not inherently wrong. It's embedded in a lot of thinking, Western or otherwise. "I'm willing to believe a thing if you show me why I should."
In the early years of UFC, the idea of high kicks felt ludicrous. But, to Steve's point upthread (and it's a brilliant point), it's not just a question of MMA suddenly getting what TMA was saying all along. Those people who brought those TMA influences to MMA were responsible for showing the MMA crowd what could be done with the right training and necessary adaptations.
High kicks were laughed at until Maurice Smith started landing them reliably. Who's laughing now? Capoeira was far fetched until a fighter knocked his opponent out with that spinning kick the name of which I've forgotten. Lyoto Machida championed karate. Etc. But, in each case, individuals came forward and said "watch this."
I think some of the flak TMA exponents get in these discussions is down to the idea of saying "so-and-so did this in the past" or "this worked on the ancient battlefields of ____." But they're speaking to an audience who want to see it done. And if they can see it done, they're willing to embrace it.
I'm not an MMA guy. At all. But my experience with MMA folks has been that they're open minded if you're willing to walk the walk. Even if it doesn't work, you'll often be respected for your willingness to set aside "knowing" and embrace "testing."
That, to my mind, is the value of the MMA approach, though I freely admit that I don't feel at home in the MMA culture.