…it all becomes useless if you do not have sufficient punching power.
Philipp Bayer, Wing Chun Illustrated
Wing Chun Illustrated makes some of its articles available on its site and this article from 2016 is a must-read. In it, Sifu Philipp Bayer makes the fundamental (and really, it should be obvious) point that without punching power, you have nothing. You can be amazing at Chi Sao, but ultimately, Chi Sao is about learning to get through obstacles in order to hit. But if your punches have no power, what good is it to get past obstacles. Chi Sao is not teaching you to evade getting hit — its teaching you how to get past the opponent’s defenses (instinctively, thus at high speed) so you can knock them out or otherwise incapacitate them.
I think Bayer is one of the clearest and most to-the-point writers on Wing Chun. This is somewhat ironic since he’s German and English is his second language. However, I lived in Germany for two years and I found most Germans speak excellent English, since they all learn it in school from an early age. But Mayer’s clarity comes more from his mastery of the language and more from his mastery of the fighting technology and his no BS approach to trying to communicate its secrets.
Many thanks to Wing Chun Illustrated for making this article available.