Like I said learning tools, not to be thought of in isolation. They are not the skill itself, the skill itself is different.
PS - And for the record Chen Xiowang is 'cheating' when he does those things. When the guy's are pushing on him (one or 100 makes no difference) he has his hands (watch his right hand in the first part of the film in particular) on them and is redirecting their force and neutralizing it. It's not a very hard thing to do. The reason I know it's not a very hard thing to do is that I can do it and I'm not very good. Though to be fair I've never tried it with that many people all at once, most I've done is four, but I suspect after that the numbers mean nothing. Certainly, going from 3 to 4 people felt little different.
I think you just reiterated my point. Your ability to duplicate any of them does not make you Chen Xiao Wang. I don't think they're very effective as learning tools either, or else we'd have a lot more Chen Xiao Wangs as well. If you got the chance to see what your level is compared to his, I think you would abandon the notion that ki tests as a learning tool will allow you to bridge the gap in ability. This is obviously not how these guys learn to do this stuff, there is serious work to be put in, and that's the real how-to.