Steve
Mostly Harmless
There is a thing in Wing Chun called mentally 'projecting' or 'focussing' force to the centerline.
This is always switched on , which means no matter what position you go to they will always be going for your centerline.
Whether you move them or you try to get to the side is irrelevant they will always be trying to face you , it is a basic of the system and one of the reasons we use pivoting.
The point is Wing Chun people are very used to having someone trying to manipulate their arms in chi sau , this is what we do.
You could argue that chi sau is a type of grappling , it is grappling with the opponents arms so that I can get them out of the way and hit him.
By the time someone has logged a few thousand hours in chi sau they will have experienced every type of force imaginable on their arms , from being latched , pulled , dragged , pushed in a myriad of directions.
That is what chi sau is for , it is learning how to deal with the various types of forces without having your stance destabilized and being sure to have your body correctly orientated to your opponents body at all times whether he moves or not.
Okay. You're right and I'm wrong. Don't know what I was thinking.
Sent from my iPad using Tapatalk