I look at it like this. "Catch a man a fish, and you feed him for a day. Teach a man to fish, and you feed him for a lifetime." If you teach someone jab, cross, hook, front kick, side kick, knee, elbow, inside block, outside block, what have you done, really? Just taught a set of techniques. Does your student now have self-defense tools? Yes. Have you given them tools to build more tools? In other words, have you given your student a reason and a way to study what they have learned, in order to evolve their techniques, and apply it throughout any situation? Maybe, if they are motivated enough to learn on their own. If you teach the why of something, though, then your student starts to learn what else will work for that why.
Teacher: Why do we through the jab? To stun the opponent and set him up for a hard hitting combination.
Student: Ooohhh! So, maybe I could fake a jab in order to set an opponent up. Maybe I could...
I am a concepts kind of guy myself. I teach techniques, but I don't just stop there. I tell everyone I train with and teach that I will give them the concepts so that they can modify and improve what they learn, to innovate and find new ways, perhaps better ways, to accomplish their own personal self-defense goals. That's what I think teaching principles, or concepts is about as opposed to just teaching techniques. Realistically, anyone can teach a front kick. Look at the local Take My Do school. A real teacher, and the real measure of a teacher, lies in teaching the concepts to a student.
Kent