Hey Royal Dragon,
I found it interesting that instead of punches, where the hand is horizontally flattened and released as a more or less external strike single point energy release, Shi De Jian's lineage, (according to RenDaHai) greater Nanyuan pai, and traditional schools do not often practice the punches. In the case of Shi De Jian and Wugulun there are no punches in their styles- and there is even a video from one of them noting that the [hammer fist] is the real way of punching.
I had found a brief discussion on the technique here:
http://www.kungfumagazine.com/forum/...t=55505&page=5
Note:
By extension- the more takedown-esque nature of it aligns with their said practice of non-violence.
A Fist is more so a direct violent outburst aimed at direct physical damage to their body whereas a takedown, redirection, or dissolving of the opponents energy is more a method to diffuse the attacker's aggression.
Not to hurt them, but to show them forgiveness (which would be hard to do in striking them). "It is very harmonious and natural" according to Wu Nan Fang to practice in this manner.
I personally believe this aligns with the greater point of practicing Kung Fu in it's buddhist context.
Edit:
I also believe the fully extended comment Shi De Jian makes may refer more to a vulnerability by extending your arm so wide open. Even if you leave some bend in it. Perhaps someone like RenDaHai could go ask WuNanFang or Shi De Jian for us XD