David Peterson once told the story of how WSL would speak to his students about not becoming a slave to Wing Chun.
DP, like many others, has taken the quote out of context and uses it as a creativity license because he never got to the free-fighting aspect of VT.
WSL was talking specifically about the strict elbow training we do and how in fighting it should be relaxed and used at will. He always said VT is not an art, only skill. The skill is clearly defined. The system for developing it is accommodating to various physical conditions, but not open to free interpretation or the skill won't be developed.
There are quite a few first hand accounts from early students (or even live-in students like David Peterson) illustrating how WSL had his own flavor of the system.
The people who spent the most time with him don't say this.
I will give DP credit in that his VT is probably better than most out there. But, he was not a live-in student. He was an occasional visitor and seminar attendee. His visits only lasted a month or so each year. That's not even enough to get really good at basic
pun-sau or
seung-ma/teui-ma drills. This is not backbiting as Geezer says. Just how it is.
PB lived in HK for the first 18 months of his time with WSL, and speaks of how for so long all he did was
seung-ma/teui-ma drills, so much that he thought it was the only drill in VT.
Yet, an occasional visitor is going to learn VT in great depth in a month or two per year? Not a chance.
When I was much younger and lived in the US, I traveled to China for a month or so each year and stayed at a school, training all day every day. It was another style, and technique-based, so I learned a lot. But I wouldn't dream of saying I learned nearly as in depth as the students who lived there year-round.
I invited the teacher to the States for seminars and he stayed with me too. But I was always able to learn a lot from fellow classmates who trained with him year-round. They obviously had much more knowledge than I had; finer details I never got on previous visits. Time with the instructor is an undeniably clear factor in that.
Now, that was a technique-based MA. Easier to pick up. A concept-based system like VT with a very abstract training methodology would be impossible to learn well with such little training and only occasional guidance. It's no wonder DP teaches a technique-based understanding of the system. All he had time to learn was the skin and hair of the forms and some basic drills.
Again though, that said, what he teaches still probably functions better than a lot of other Wing Chun that's out there. So, it's not terrible. It's just missing a ton of detail, most importantly the understanding of free fighting strategy and tactics.
So, I'd either take what he says with a huge grain of salt, or not listen to him at all.