I believe in order to make life less complicated, giving teachers the satisfaction of authority and pride is necessary. In my experience teachers teach what they have been taught. Never question what they are taught nor ask or care for pupils views, opinions or in my case listen to facts. For example religion.
Yes I have common sense, to take in regerrutated, unnecessary and as a matter of fact a waste of pupils precious time in education. Religion fundamentally boils down to morals and the effect of choices made.