I mean, yes, I get it, but I understood the sets my HS team ran (they were all the Carolina sets) in a way no one watching game tape of us could understand them. I knew the pressure points, which man was the key rotation that could be hit or miss, which spots you never wanted to throw the ball into if you were the opposing offense, etc.
By my second year in the system, I understood the Carolina sets in a way that was pretty next level. Dakich is a smart guy, even if I think he's pretty damn limited as a college basketball player. I think you're being a little dismissive of what can be learned by running something in practice after practice, day after day.