Saying something is "a product of very specific physical creation" in one sentence and then saying it is "a sophisticated combination of physical actions and mental processes" on the other seems contradictory.
I don't think so at all. IMO, a good physicist can give a brief synopsis of what string theory is, but to get to the point where he can do so, he had to understand some complex concepts to great depth. It's kinda like that. Not that aiki is as complicated as string theory. It ain't.
There is a basic set of processes one must gain some proficiency in, but then there are myriad variations and nuances in how to use it, and to mix it up...and that's where the sophistication is.
Sometimes, the simpler something seems, the more sophisticated it turns out to be because someone (or someones) refined it over time and presented it in a teachable way that the rest of us can comprehend and do.