Going off on a tangent...

A good friend from college is a professor in finance, a PhD & CFA.

Twenty years ago, when students asked questions, he would explain the principles, go over the equations and do the professor things.  Students listened and did their homework.

Nowadays, when students asked questions, he would explain the principles, go over the equations and do the same professor things.  Students would complain he was mean.  Other professors, who would just tell the students what numbers or words to put in which boxes, would get high scores in the professor evaluation.

My friend teaches graduate courses.   God bless America.