There's a wonderful movie called "By the Sword". To the best of my memory, the fencing master in an epee bout with his promising competitive protege suddenly springs straight up and thrusts straight down on the kid's wrist. The kid tears off his mask and screams, "You never taught me that!"
The fencing master screams back, "I can't teach you surprise!"
That's the problem with a lot of tricks, with most of the tactics that attack the mind or the context or the relationship directly. The obvious concern is that if you show people the tricks the tricks won't work as well... but obvious doesn't mean important. You show a trick, people memorize the trick. It becomes a technique. The things that made it work (reframing the question, fighting in the emptiness, social/asocial juxtaposition, feeding expectation....) get lost. I can teach tricks that might allow you to gain surprise, but that's not the same as teaching surprise itself.
Same with the Baby Drill. I took it out of the drills e-book not just because it is more a trick than a drill or just because if you read it, you won't make the same mistakes, but because if you read it you will THINK that you know it... but even people who do the baby drill don't always learn the lesson of the drill. We've demonstrated that again and again.
Reading, hearing doesn't lead to understanding. Even a few experiences don't always. And if you learn something real good, it doesn't mean that you will be able to recognize when you can generalize the lesson.
So, attacking the mind, the no touch parry, the baby drill, knife exposure, super woofing... some of the cool stuff will have to be in person. Not because of the exercise, always, but often because of the debriefing. The no-touch parry looks like magic, but I can explain why it works. More importantly I have a good handle on the personality types it will fail. You kind of need to know that.