In my experience, this is something that varies between departments and even professors within a department. I am not convinced it is possible to generalize about a university’s approach to teaching.
As a VERY general rule of thumb, the humanities and social sciences tend to place more emphasis on teaching than STEM fields, but even this is variable. It’s not uncommon for math departments to have “teaching faculty” and “research faculty,” for instance, and the former are obviously expending more time and effort on teaching than the latter.