I think that this thread, and some of the attitudes here, shows what is wrong with *some* of the attitudes around MMA.
The best MMA guys I've met are also some of the best TMA guys I've met, and vice versa. TMA's tend to be quite a bit more esoteric, conceptual, and philosophical, and slower to learn, and so many people who are interested in just becoming as competitive as quickly as possible, and are only focused on competition, understandably don't have patience for them -- but there's a lot to be learned from TMA's as well as more competitive arts. Sometimes, depending on the TMA and the teacher, it's just up to you to make it functional under pressure. Other times, it's functional right out of the box. Most of the time, it's functional once you understand the context and where it fits in within the approach of the system that you train, and the context that you are testing it out in (which is sometimes appropriate for sportive environments, and sometimes not so appropriate for them).
It's totally fine to say that MMA is the quickest way to reach your goal of competing in a sportive environment, but it's a totally different one to argue that MMA is the one and only best way, and that it has more value than all other arts in all contexts. The first statement is honest and defensible; the second, I believe, is short sighted and a bit arrogant and possibly ignorant.
Like I said, there are a lot of people who continue to train, and see great value in both. I find I tend to learn the most from teachers like this. There are serious limitations, and selective forces at play with any competitive, sportive environment that people don't acknowledge nearly enough. There's a *lot* of very good stuff to learn outside of that context as well, and there are plenty of ways to pressure test it and make it functional too.