That was their words. I agree with you to an extent but I also understood what they meant. In terms of their reasoning it was like this. They see the basic techniques and principles one will see up to a basic understanding Chum Kiu and this is the foundation of Jun Fan. Then they see the other things that Bruce added to this foundation. Now if Bruce had a full understanding would he have felt the need to add these other things on top of it? I won't pretend to know what would have gone through the mind of a person dead for 3 decades and more but that is how it looks apparently to those standing inside the Jun Fan/JKD bubble. They see the foundation not knowing the foundation is incomplete on it's own and then see what was layered on top.