So you see chi sau as being directly applicable to fighting?
Not the Chi Sau "structure" as it is drilled. But the Chi Sau skills used at that range should transition over to fighting. The idea that you are trying to hit someone, they put up a defense to keep from being hit, which makes contact with your punching arm forming a "bridge" and then you use that contact and your Chi Sau skills to clear away their obstruction and continue to hit them. Or you are in scrap and things are not working as planned and you are in close with an opponent trying to put hands on you and tie you up to keep you from striking...that is where Chi Sau skills should kick in. And that is also where it becomes similar to the "clinch." And just the idea that the Chi Sau rolling platform used for training can be a jumping off point for either closing to grapple or for striking, also makes it similar to the "clinch."