And, hopefully not, it will remain as is, 'students should not ask questions it's not polite to the teacher'.
Or worse punishment for trying to ask questions. Happned to my Thai son, went to a school where strongly encouraged to ask questions. Had to return to a typical gov't school, asked a question and was severly punished, failed for 2 semesters.
Ultimtely the above all relates to the fact that many teachers are not capable / don't have the knowledge to answer questions. i.e. they know the correct (mosty correct) answers but they don't know why it's the correct answer.
And it goes back even further, most of the current teachers weren't allowed to ask questions when they were kids and the scenario continues.
Further, 99% of the current teachers have had no training in student centered teaching/learning and they therefore refuse to adopt the new methods, because they don't know 'how to do it'!