“Proper education” is student, culture and even teacher dependent. There is no singular best practice. So many of the sit down, shut up models of education in other countries produce students which routinely trounce US students in math and science. At the same time, so does Finland.

My point above is that the belittling is a major part of the problem. You want to denigrate an entire profession, sure, but it has consequences, something we're seeing as experienced teachers leave the profession.