Fair enough, and I learned the hard way after years and years of karate that not only did I not know how to fight, but I didn't know how to punch or kick either, and I'm still unlearning that damn stance. My favorite way of testing newfound skills from a seminar or whatnot is to take it to a completely different place. Last time I did a WSD course (it was actually a good one and we did drill and then practice against progressive resistance, esp. me because I told all the guys to go really really hard so I could make sure I got it
and wondered the next morning whether that was really necessary) I learned four techniques that I thought were questionable and took 'em to some guys I train with, without telling them what the technique was. Two of the four worked, one required some modification for my body type, and one will never ever work.
BUT if the whole point of training is for fun, or "an intense form of yoga" or whatever you want to call it, why does it matter whether it's realistic or not?
What if someone gets more pleasure from practicing skills in a vaccuum at Ernie Reyes West Coast Tae Kwon Do than, say, MMA? Training might be more fun than dead forms once you actually get down to sparring, but there's probably more drama, ego, politics, bullshit, game playing, etc. than just about any other activity I can think of.