Stefan, I'm not sure if you're aware of it, but there is a valid body of thought that the idea of ki came from the early explanations of how the body moves. I.e., that discussion I just pointed out has a very great deal to do (potentially) with the "origin of the qi concept". The human body is thought to be a reflection of how the universe works... and vice versa. Think about that and which theory came first. No one knows for sure. But I think we can assume that it would be odd if the actual movement of the human body coincidentally conformed with some disparate view of how the cosmos works, right?
I think it would be perfectly consistent, however, to consider that as the emergence of man continued along the observation that he worked the same as the world around him would give rise to language that communicated this insight.
BTW, welcome back, Mike.