You know brother this is the source of many of wing chun problems and it stems from this way of thinking. There is only one right way. Of course that right way is my way. Then here are the stories I believe and my arguments based on those stories to support my right way.
I think this is complete and utter nonsense. There are many many right ways. They often are contradictory. They can come from the same coach or instructor. You see the exact same thing in boxing. The difference in boxing is that the argument takes place in the ring not in words. The ring shows us this is absolutely true. There is no one best way that works in the ring.
Wing chun or any true martial art for that matter is not a dogma. You are not bound to do something a certain way for any reason other than you find through your training that it works best for you. Martial arts have to be very flexible in the tools and tactics and strategy because each person training has a different mix and fighting requires us to be highly adaptive. The system has to be adapted to the individual not the individual molded to fit into the system. The system is just a guide or a toolbox. Even WSL said do not be a slave to the system. How we use it is up to us. Two boxers from the same trainer can look and move in very very very different ways and both be very good.
The people who are getting in the ring and mixing it up can't help but see this. You get in and get soundly beaten by guys who do things in ways contradictory to your understanding. You see guys at a very high level doing things very different from you and it works very well for them. It broadens your view.