Another myth to debunk: you don't play only with your fingers!
Unfortunately, at the Conservatory I attended until a few years ago (I avoid saying which one), it was a fairly common opinion among pianists that one should play the piano sitting straight on the stool, motionless, without moving the shoulders, moving only the fingers. If I were to play like that, people who know me would laugh in my face because I become a different person This is not good in music!
Look, I believe that "technique" must adapt to the anatomy and psyche of the pianist. I cannot teach one of my students to play exactly as I play: that would be absurd!
As far as I am concerned, I am asking myself many questions and I have understood that the whole body contributes to playing: the shoulders, elbows, wrists, chest, abdomen, legs, and even the anal sphincter and eyebrows One must alternate moments of tension, almost of "effort" (careful, effort is not the same as rigidity), and moments of "floating". Some teachers would fail me for this approach of mine: patience! The result is what counts. Logically, the road is long and I certainly know less than a teacher; but I believe I am on the right track.