A School for Life

Well, in case you didn't noticed the above is a pun, refering to a well known book title about the Alexander Technique, "A Skill for Life".
I like to think of the Alexander Technique as a school for life, rather than a skill for life. One of Alexander's teaching aphorisms is about this diference: "The experience you want is in the process of getting it. [....] Getting it, not having it, is what you want"
A skill is "having it", whereas a school is "getting it".
That is a diference, that afects also the teaching of the technique. "Getting it", means that the student has to get it, he must make the efort.
The teacher must let the student experiment by himself, make mistakes, develop his own understanding, so that he will not depend forever on someone else who knows.

Note: In the above aphorism, Alexander says "you want", but it would be more acurate to say "you should want": we all want the easy way!).

End-gaining: Brute-force

Alexander considers mainly trial-and-error, but there is another very common aproach which I call "brute-force"
When learning piano, a "brute-force" aproach is repetition: play again and again until getting it right.

Exercises, like those for the "independence of the fingers" are one example of this kind of aproach

The diference with "trial-and-error" is that in "brute-force" it is the endless trial of the same alternative.

About posture

Posture is a means-wheeereby
A bad posture will cause all kind of problems, bad posture will be a handicap for high-demanding activities.
But good posture is only a begining, not the end