*gleeful* I showed this to the software developer to whom I am married (whose attitude toward HP meta ordinarily is an amused "it's a kid's book, Sophie, I don't want to overthink it") and he was intrigued enough to go on talking about it - not only your analogy but musicians vs. composers and Harry vs. Fred & George and training 11-year-olds to levitate a feather vs. training oneself to cast AK - for quite a while before running out of steam.