Master teacher, advanced student. There’s just tremendous trust and respect. It made me realize that yelling at people is showing a lack of trust that they’re listening. (Cue up people explaining that’s not the only thing it means.) I’m not saying you can always trust that people are listening.
At about 19 minutes, there’s a discussion of why it’s hard to play softly on the piano and what helps. The challenge is that the key still needs to be pushed down fast enough or the string won’t sound, and relaxing the hands too much makes it not work– the hands need to be at least as firm as when you’re playing loudly.