Changes over the past 50 years to higher education systems now require lecturers to be aware of the strengths and weaknesses of different teaching methods, how learning actually takes place, how to select and use technology appropriately and how to validly assess students. We can argue about the details, but the broad picture is overwhelming: post-secondary instructors need proper training to teach well.
https://www.universityworldnews.com/post.php?story=2019112809050642