Why can't they? Because the stuff presented here is written in a vague-enough way so as to be intepreted on many different levels, depending on where the reader is coming from. Every word can be read and result in a chorus of "we do that, too!" The distraction of writing about external movement, or movements that can be interpreted as external, without any detailed explanation of the underlying drivers will never serve as proof of anything.
Again, "Watch my hands! At no time do they leave my wrists..."
If Jun ever (not that he would) decides to go to a moderator approved only posting format, I vote you to be the moderator.