Earlier quoted context omitted.
It isn't the sequences or even the outward shape of Tai Chi so much as what is happening within the body that generates the shapes and sequences. There are long-term, transformative effect on the body. For example, my own musculature have developed structures you cannot develop through weight-lifting. I can tell you for example, xingyiquan, baguazhang, bajiquan, wing chun, akijutsu (among many others) all (historical…
What kind of structures did you develop that you can't get by weightlifting? I assume these are some kind of stabilizers that you train by some tai chi movements. If this is the case then it should also be possible to train these using a weightlifting regime with some specific movements targeting those stabilizers.
There are a lot of weird capabilities that can come out of it, but those ridges are probably the most obvious effect, yet it is among least documented yet observable effect when you go searching for things about tai chi or yijinjing.