IMO, there is a difference between not showing because you dont know, and not showing because you want the student to think for themselves. If we tell them nothing in kata, then by that same logic, we dont have to tell them anything when showing self defense technqiues either. Just simply tell them to move this way and that way, and figure out what they're doing and why.
I feel, and again, this is just my opinion, that the student needs some sort of foundation to build off of. Lets use the SD techs. as an example. I teach a tech. to someone for a preset attack. I also teach them how to block, punch, kick, move, etc. I've run technique lines, and tossed out an attack to a newer student, an attack that they didn't know a preset defense against, and they give that deer in the headlights look. Upon asking them if they know how to block, move, punch and kick, to which they say yes, the light then goes off, so to speak, and they learn to build from there. But the preset tech., and the explaination of the basics and how to put them together, all aids in that. Eventually, the goal, IMO, is to just react without having to think. But when you react, you want to react with something thats going to make sense, not some hodgepodge of moves, tossed together, in hopes that what you're doing works or will work.
Back to the kata....it was interesting for me, when I was at that Dillman seminar. Things that I thought were designed to block a kick, were really pressure point hits, designed to flow with other moves, to hopefully get a KO. Again, if the instructor knows the true meanings, and is guiding the student, letting them think, but also guiding them to whats right and wrong, then fine, I can agree with that. If the inst. is simply letting the student loose, never correcting them, never guiding them, then IMO, the student may a) come up with some weird translation, which could be ineffective or b) never understand what the kata was really designed to do.