I know what Pete said. I disagree with what he says. The fundamental disagreement we are having is: I think internal is natural, and Pete thinks it is unnatural. Now we are trying to hash out what we do agree on.
Sure, but this is an old problem that has been commented on in many of the classical texts. These movements are "natural" in the sense that they follow the "natural" lay of the muscles and tendons and they use the "natural" laws of gravity and the support of Heaven and Earth. However, these ways of movement are not "natural" in the sense that people naturally do them. They must be learned; they are not instinctive. Many, many amateurs think that "natural" somehow implies "instinctive"... that is totally wrong.