And there are a lot of instructors like that.
My take as an instructor takes the opposite approach and each session is structured based on what the students have decided they want to do in the next session. This is done at the end of each session.
As you said an instructor has to be flexible and adjust to the students needs. If he, the instructor, does not that student will lose interest and leave. An instructor should be helping the students with any issues the student is having and not just sluffing the students concerns off and basically ignoring them.
The problem I have is that most of my instructing is to small groups of 5-7 people and I have to be careful that individual student concerns do not sidetrack the whole group.
At the end of a session I tell my students what I plan on covering in the next lesson and ask if they are comfortable with that. If they don’t agree with me I have them pick what they want to cover in the following session, and they vote on it, and I structure the next session along those guidelines. This approach has worked out very well for me over the years.
Hopefully the COVID restrictions will get better and we can get back at it.
In the end it’s all good and we are playing music together.