Chi is a word for whatever makes natural processes happen.
Simplistically, of course:
What makes us move? Muscles change shape.
What makes them change shape? Electrochemical reactions sent from the brain through the somatic nervous system.
What makes electrochemical reactions happen? Call it Fred, call it Zip, call it Chi, call it Prana. Bio-energy? Whatever.
(The word is irrelevant except to facilitate communication through consensual validation.)
It only seems like magic because we are so out of touch with our bodies and how their functions feel. If we get in touch with Qigong and what it feels like (slowly, gently) we'll see that it's not magic.
Chi is no more magical than being alive is. Some practitioners demonstrate chi to make money, to intimidate us, but the humble demonstrate it to show how possible it is, effectively saying "look, even I can do this!" But that's Chi talk. As for TCMA, Chi may or may not be an explicit component of a system.
As for magic (again), it's only magic to someone who places himself in an "I'm not worthy, you're a wizard-magician-Jedi" position. You can see why, for a practitioner who uses TCMA techniques every day, such an attitude might mark the believer in magic as a bit of a rube, not worthy of much respect.
... because he'll never be a colleague, on the same path. So the practitioner puts on a show and saves the real instruction for those who don't believe it's magic.
As long as we believe something is magic, we'll never be good at it. In order to be good at it, we have to make the paradigm shift that it is not magic.
To put it another way, if we're in the film business and want to work with Steven Spielberg, and we want him to respect our opinion, we have to think of him as a respected colleague, not a celebrity-god-figure. See the mental paradigm shift?
I understand that perspective and the apparently negative associations with the word Magic.
If I look at it from the common definition of magic, then the word doesn't fit with how I am using it, because it does connote a sense of this thing beyond understanding.
But I use it because it often is beyond people's mental paradigms and understanding. This thing which is a natural part of living beings.
If we remain solid on what the word magic can mean, that it is a roadblock to growth, then it cannot be used, but I see the word as the first stage indicator to understanding.
If I see a martial art demonstration for the first time, I may be like, "How did they do that?"
I would have had that magical fascination with it. But that doesn't mean I am going to stay in that state, I can move on and learn more.
Going by my own experience, having that initial magical fascination has not arrested my growth in whatever art.
When I first saw someone play the guitar, I thought it was magic, I wondered if I could ever play like that. When I was 10, now I can play like breathing. When I first saw Michael hedges play the way he did, it was magic to me, and I wondered if I could ever play like that. Now I can.
When I would see a Spielberg movie, like Jaws, or ET, when I was a kid, I thought it was scary magic. Now I do make my own films, not professionally, but that doesn't matter to me, just that I can create my own magic.
When I first got into martial arts, it was magic, and I wondered if I could ever do it like what I would see. But this keeps evolving. Now, if I see someone do an incredible kick, or an amazing wushu display, it is magic, and it inspires me to find out and be able to do it. It does not arrest my development.
Chi is a word, and what is behind it just is. You don't have to learn it or even be able to talk about it to know how to utilize it. I knew it before I knew how to talk about it.
But cultures have come up with ways to talk about it. The chinese, among others, have put centuries of erudition into what it is and how it works. They don't describe it as magic, but something that already is in everyone, and how to realize that. They talk about polarities and meridian lines and the connections, among many other aspects. They talk about the difference between western medical perspective and eastern medical perspective.
They have come up with ways to show people, that have become accustomed to perceiving things only mentally, how to utilize chi.
I understand like, the wushu Duan levels, some people think it is silly.
I know if someone said to me, "I can teach you this martial art, I don't give belts, certificates, rank, or uniforms, I will just teach you everything I know of this TCMA and that will be that."
I would be fine with that. Because just to be able to learn and do that, would be magic enough for me.
All the toys in the long run, don't mean anything. They don't mean anything if you forget what it was you got them for.
If I got a belt or trophy for doing a form well, if I forget the form later, what does the trophy mean.
Of course in a longer timeline, the physical aspects of the martial art will be lost, when the body dies. So what will be kept then?
So in the short run, I enjoy the toys too. I like the belts and uniforms, and certificates, and still I know they are not significant, in the long run.
A lot of instructors know that there are all kinds of students. Some may need the motivational magic of a higher belt rank, of reaching another Duan level.
I don't need that stuff, but it doesn't bother me either.
Just for the record though, no one has ever told me martial arts were magic. If you think about it, it serves them no purpose to do so, if they intend to teach you it for money.
Only if they have no intention of teaching you.