I can't speak for others. My students are welcome to question and to learn. They are welcome to observe and participate during treatments (client permission). My students are welcome to question me any time they choose. Student needs drive the teaching.
Learning is a process some people do not understand that. They feel that the attunement is all you need and whatever questions you have will be answered at that time. Could also be that your teacher did not know the answetr to your question........never experienced that reaction before.
blackearth