I understand your reasoning but I think the method of postural management that is called "standing on ame no ukihashi" in fact brings about solid stability just as much as it does quick movement that lacks "anticipatory postural adjustments" etc. (It's about becoming internally unified, which affects ability to move as much as ability to not move.) Just want to put that thought into this thread to explicitly voice the other point of view - not to get into a discussion about it in this thread, but just so that they are both on the page.
Well said. Thanks for pointing this out.