@kaminchan apparently bruce lee was also someone who appreciated Jiddu Krishnamurti.
From what I read, I am sure the both of us would have some interesting conversations.
Your account of the tai chi experience sounds incredible. It might sound unbelievable to most people. They'd think it's impossible to repel someone without force.
Recently, I have been thinking about the fact that martial art training has taught me a thing or two about muscle memory and since a couple of years now I have been delving into the topic of the fascia.
I'd also treat taiji and qigong as very different. Apparently qi gong is more ancient and taiji emerged sometime around the 11th, 12th century AD.
I am convinced about the positive effects on the deep tissue ECM(Extra Cellular Matrix) and to boot a healing process on a parasympathetic level through qigong. A both breath and mind coordinated movement really does have a very specific method of achievement and you are right when you say that probably only very few truly mastered it.
I got into vinyasa and I can tell that somewhere along the original lineage of astanga vinyasa must have been a teacher who had a flow that was similar to some Kalaripayattu from a time where all these practices merged from various fighting styles.
Can only fathom how strong their qi/parana must have been and their ability to extend it.