Let me put this out here. Until a few years into OEF, CQB (hell, even combat in general) expereince in the Army (at least) was very thin. It wasnt uncommon for soldiers teaching CQB, or any other combat-related taks, to not have any practical (aka done it for real) expereince in the material being taught. So, how did these individuals teach the material for years? It was because they were teaching off of vetted, established lesson plans. Are you going to be able to bring people a high level this way? Not in most cases but you can bring people to a certain point.

