I happen to think that training with headgear (and body shields) is detrimental. Many conventional boxers, never mind wing chun people, agree with me. It blatantly throws off timing and targeting.
I also happen to think that training with gloves is detrimental for the same reason- why would it not be after all?
Another issue with protected sparring is that it encourages a sports sparring mindset, moving in and out, no rush, plenty of time, feeling each other out, i.e. not a fight. This is anathema to wing chun. I want to train for fighting, not for ring sports.
The difficult truth is that wing chun is not very good as a ring sport. It is quite predictable given the time and space to figure it out. But that is also its strength given no time and no space. Look at Alan Orr's wing chun- it barely resembles the martial art that most of us are doing. It has some power chain elements, some forward intent, but not much else. Even the stepping is gone- they move like boxers.
I train mostly bare handed light contact or controlled target full contact. As often as I can I train bare knuckle full contact. This is not an extra ordinary claim given what I believe. Videos posted of actual bare knuckle fights show that it generally isn't that damaging, bar some cuts, which is my experience of it. Maybe I have just been lucky but until that changes I intend to continue doing it and advocating it to other people.
Let me ask you a question- do you think Yip Man and WSL got good at wing chun by donning boxing or mma gloves and slugging it out in training? If not then why should we do it? Or don't you think they were any good?
You know why? Because they talk sense, even if I don't agree with their methods. They don't tell everyone else their training is unrealistic and more harm than good, and meanwhile make extraordinary claims of taking full contact bareknuckle face shots as a part of normal training without providing extraordinary evidence (actual footage). So, yeah... the same?
You are all telling each other all of the time that each others training is a waste of time. And you all make extraordinary claims of efficacy and competence. This is what wing chun people do, lol