Of course they would do that.
To me this seems a bit like a cult. The problem can NEVER actually be wing chun itself. If a wing chun guy gets destroyed by another fighter then his wing chun simply sucked. Problem solved.
Life can be so easy.
If actually making use of wing chun is sooooooo hard then it's useless. Then somebody who trained wing chun only for a few years and is considered a beginner basically has no chance in a fight cause his wing chun simply hasn't gotten out of sucking state yet.
I am really disillusioned with wing chun. I wish I hadn't wasted so much time watching wing chun videos.
I should better have watched silat videos or something else which is more promising in real fights.