I just don't think people really appreciate how unprecedented the Schottenheimer hire was.
At the time I think most of us were just stunned and kind of willing to see where it went, but has there been a HC hire in the last 10 years as illogical as that one? In the last 20? Since 2000?
At least there was some sort of logic behind hiring guys like Urban Meyer, Chip Kelly, Matt Patricia, Matt Nagy, Nathaniel Hackett and so forth. Elite college coaches and coordinators of recently elite units on teams that had a track record of winning, all of which were getting interest and HC interviews around the league in some form or fashion.
I can't think of a single example of an anonymous coordinator with no significant recent success being hired as a HC after not receiving a single HC interview anywhere else.