Since all of the different interpretations of YM wing chun that I have seen are different, it is disingenuous to make out that they are all similar while only WSL VT is different. In reality they are all very divergent, pointing to a widespead lack of understanding.
Yes, and the divergence begins most strikingly at Biu-ji level and the weapons, demonstrating that most never got that far into the system and had to make up a bunch of nonsense while not understanding the whole picture of VT.