I was very shy as a child, almost morbidly so, and I always did what everyone told me to. Except on the piano! My first teacher told me to do a few things that just seemed wrong to me, and--as I learned about twenty years later--probably would have ruined my hands. Not just my technique, my HANDS. I thought she was wrong, although I couldn't explain it, so I quit. Since she was the only person available to me, I didn't study with anyone for years and years afterward. It's been almost the only thing in my life that I have been so self-protective over. Since then, other teachers have also asked me to do technical things that I had a bad feeling about, and I just wouldn't do them. I am probably not a fun student to teach! but I still have my hands, which I wouldn't if I hadn't looked out for myself. The teachers I've had in recent years have been real master performers, and they have not tried to physically change my playing; instead, they have shown me more techniques for specific situation, how to make more sounds, find my own style, and take more risks.
paulsylvia... , were you really writing about your own experience? I am horrified. I'm suspicious of teachers who tell a student that she's/he's doing it all wrong. I mean, how is that even possible? Anyone who has played for years and spent time on it must have figured out some aspect of playing that is working, even if it's only that aspect. "Doing it all wrong" means, to me, doing some things that the teacher doesn't understand. For example, some technical quirks actually make sounds that we need to make sometimes, but which wouldn't be a healthy way to play all the time. So, the student has still made a useful discovery, it just wouldn't be the foundation of her/his playing.
Many people don't recognize any path but their own, and they are either threatened by someone taking a different route, or they honestly just don't know how to work with someone's playing that looks different from their own. Either way, I find this troubling.
I really like the sound of Alzado's teacher. She is someone I would like to know.