Mary Eastland wrote:
A newcomer could trust themselves. One does not need an" expert" to tell them what is good for them.
Really? How do I "trust myself" to know that sensei is doing a drill in such a way that anyone who does it will have joint problems in 5 years? Or worse, that sensei is doing a drill in such a way that it won't work on anyone who doesn't expect it to work? These are things that you can't expect a newcomer to know.