I think it's important to emphasize every aspect of every technique as a "stand alone move." Before I teach my students a technique, I teach them the attack and make sure they have a thorough understanding of how it works. Then we practice the basics contained within the technique to make sure that each basic, and especially any new to the specific technique, are understood and the student can execute them with focus and power. Any other issues specific to the technique such as footwork, concepts, anatomical alignment, etc. are also drilled and practiced in a variety of scenarios. Only then do I teach the student the technique in question, so that they can continue to practice all the component pieces we've worked on. I think if you only teach the technique, without breaking it up and practicing the basics which it is comprised of, you may memorize the motion but not be able to execute it effectively.
I'm not accusing any specific school of this, but I know that some kenpo schools get a reputation for having weak noodly kicks, because they don't practice the kicks as individual basics in the air, on pads, on shields, on bags, on the body. Other schools may know a defense against a joint lock from a technique, but not be able to use a joint lock against an opponent. If you can't properly throw a roundhouse kick or submit an opponent with a figure four arm lock, how can the student practicing the technique really know if it will work against the attack it's designed for? The techniques are teaching tools. Yes, they can be executed as defensive combinations, and that is one of their purposes, but to not understand every aspect of the technique, from attack, to defensive maneuver, to the specifics of the counter offensive combination, and even including a thorough understanding of the dummy side of each technique, is to leave much of the information they contain in the packaging.
-Rob