Push Hands And sparring are 2 different things, like you stated. I understand sung is important. I do not believe sung to the level these masters display is efficient for combat. Sung means using the minimum amount of force to require a task, not be a floppy wet noodle.
I can respect that. We don't have to agree on everything. I also do not want to argue. Some things are better understood through touch, and I feel you also may be misunderstanding what you see in my video above. But that's fine. We can agree to disagree until we meet. Hopefully my video I'm putting up in a few weeks will help you with your knee pain.Sean, I will not argue with you, believe what you will, however the first one, Tung Hu Ling, opened a taiji school in Thailand in the 50s and there were challenges, and he did not lose. My shifu was there helping him open the school. I have also been on the receiving end of something very similar from my shifu and run into it with 3 other people as well over the years (1 Yang style, 1 Chen Style and 1 Dachengquan) And they are not floppy like a wet noodle, that would not be sung. if that is what you see, I do believe you are missing something.
the water metaphor is silly, water offers significant restance, try running through water, and it doesn't become the bottle or the cup, it takes on that shape as it's a fluid and that's what fluids tend to do, but so will sand and oil and cement, and thousand of other things, but one says be like wet cement