If the goal is to produce a good fighter, not to simply learn Wing Chun, then the drilling shown above is higher yield than Chi Sau. Otherwise most other fighting systems would have something like Chi Sau and less drills like those above.
As I already said, Chi Sau has its place. I just think it is over-emphasized at times, and sparring not emphasized enough. Of course, this is very school/instructor dependent, even within the same lineage.
As I already said, Chi Sau has its place. I just think it is over-emphasized at times, and sparring not emphasized enough. Of course, this is very school/instructor dependent, even within the same lineage.