No insult - just my opinion about this kind of theories!
No. There's a
huge difference from what a boxer does to what is being advocated here: A boxer resorts to the same tool (his good old punch) no matter what angle, distance, position, or timing dealt with. He targets larger areas with the same tool and it will do damage no matter whether he got you anywhere on the head or anywhere on the body. He keeps it simple (Ving Tsun!) and does not have to think first about whether to cross his fingers in a certain way before striking, nor is he looking continuously for that small spot on the inside of your left forearm...