As a talented child, teachers wanted to "put me out there" and rushed me into "making music", rushed me into "sound images" and I had to figure out the mechanics for myself, and if I didn't get it right, it was because I was lazy!
In a distant way, I can relate to that. It is distant in the sense that I did not have lessons until I was way into adulthood. I started on an instrument I had never played before. I picked things up quickly. I have a natural urge to be expressive so by hook and by crook, using the little bit I'd been given, I made my music as expressive as I could. My playing probably had more flow to it than that of most beginners, and I advanced fast for a year before running into problems. At some point it became a search for "technique". I ran into absurdities and did weird things while trying to solve this on my own, and then I abandoned that because it was tying me into knots. Meanwhile, students may have the wrong idea that technique must be perfect, and if they could "let go and relax" they could play with greater ease. So thinking that was going on, I was encouraged to make music, as in your example. It IS true that to some extent, what you feel and hear in your mind will to some degree transport your body to do roughly the right thing. But that only goes so far, and you can also do wrong things by going that route. In any case, I found myself in the situation of being encouraged to make music, without knowing how to go about doing that on a technical level.
At some point through a lot of twists and turns I found out what I needed. Roughly I think I can outline them as follows:
- There are some fundamental basic things that help you move in a good way, and your playing grows out of that (or if you have fundamentally flawed things, you are inhibited). Then there are specific things to do.
- Technique involves knowing how to use your body to produce a wanted sound on an instrument. You have to understand something about the instrument too.
- You're trying to produce music, so you have to know on some level what you want to produce. Crescendo is an element of music. So how do you produce crescendo physically? Will you decide from "how soft" to "how loud" you want to go? Will you decide that in the context of the whole piece?
- Effects such as passion, pathos, sadness, suspense, or "making the listener want to dance" also translate into such dry things as choosing to crescendo, or emphasizing a note, or slowing down significantly somewhere. You get into elements of "theory" here - understanding how music works. From that theory and those decisions, you are back into technique - how do I produce these things?
- How do you actually practice and develop this in music? Before you have the technique, what you do with the music is limited, which is ok, because you are developing other skills. But when you do start having skills, you still need to know how to learn a new piece, how to build it in stages, and things like that.
All of the above are a far cry from, "Take this home and make it musical after you know the notes."
I got a piano at the tail end of all of this. I had played self-taught decades before and knew that whatever I had done physically back then would not serve me. For me personally, what seems to help me, is to keep the "music" (expressiveness) that I want to produce tucked away in the back of my mind, but work fairly mechanically to get the habits into my body that I need to get. Otherwise the feeling takes over and runs what the body wants to do, and generally those are not good things.
But as in any serious undertaking that requires the expert use of the body at high athletic levels -- and make no mistake, pianists ARE small muscle athletes -- it cannot be gone about in any old way, and time mastering the basic mechanics and time maintaining the basic mechanics, is a must with no shortcut, IMHO.
Here is where you see (unnecessary) arguments, however. Because while everyone agrees that a set of things need to be learned, how to go about it will vary. I think that there is no one right way - what ultimately matters is that at the end, all the elements will be there. Teachers will have different approaches, and they will vary it according to the student. You have a bunch of things interrelating, and some are almost in contradiction with each other, but still belong together. The bottom line is that it works, that in the long run the student has what he needs, and that it works for that particular student.