You kind of alluded to the flaw in some TMAs right there. Aikido, kung-fu, hapkido, they work on drunk fools. If you're good enough some techniques work on people with training. But against killers who also have training? Not really. Boxing/kickboxing, muay-thai, BJJ, and wresting -- these are the four pillars of MMA, as most of their techniques work on drunk fools and trained killers alike. TMAs are useful no doubt, and when you supplement them in with the more practical martial arts they can be fun surprise. Some of my fondest memories sparring are times I did something unorthodox and it worked. But that's just because I don't remember the 1000 times that leg kick worked, because that shit is automatic.
Love me a good kung-fu movie, though.