Nothing wrong with venting
azwingchun,
I totally agree that any system with standing grappling should be able to use it while on the ground. But there are some things that need to be addressed when on the ground, though. The feet can come into play much easier now 
Styles that may have had a ground fighting system, but lost it throughout the years doesn’t help much when the practitioner is thrust into that scenario. Even if the system was “uncovered” by a dilligent practitioner, it still doesn’t compare to training with people (or a style) that have been using the ground fighting components of a style in a much more live and direct way for years (or even generations, like the Gracies) already.
In all my kung fu years, I have found many grappling and wrestling elements in the style, but that didn’t make me proficient in their use. I just knew they were in there, and practicing them with others that didn’t know about them really didn’t do much for me to sharpen those skills. It always took another practioner from another style (most of the time it was wrestling), with a lot of experience to show me how to use the stuff from my own style properly.
But with the whole thing about bjj, I haven’t found many elements that resemble the in depth approach to ground fighting that this style has always had. I mean it’s cool to learn some Chin Na to take an opponent down, and subdue them, but to me it was also necessary to learn how to fight from “the bottom”, in order to get control of the situation, and get back to my feet. If I can slap an armbar on someone from the guard, then that lets me know that I can break an arm, and get up quickly if I even needed to. If I can sweep someone and take a full mount, or knee on stomach, then I know I can get to a better position if there are other factors that I am worried about (like his buddies).
We don’t always have a choice how the fight starts, and if some thug decides it’s gonna start on the ground with him on top, then I would prefer to have skills that I developed by actually practicing techniques in that situation, not based on some theory that what I learned standing up, SHOULD also work on the ground.
Another thing, it doesn’t matter to me where I learn these skills. I don’t care if the paper trail of masters can fill a file cabinet, if it works (not if someone tells me it works, I mean if I can get it to work), then I’m gonna use it. I don’t give a crap if I developed my ground fighting skills from Brazilian Jiu Jitsu, Drunken Monkey, or even the Tae Bo Grappling series. If I can get it to work, then I have more faith in it 
Jaguar Wong