The opposing view is that football skills are taught, but athleticism can't be. There is something to this. And given that we are getting some better athletes than we've had recently, we could be in pretty good shape if our coaches do their jobs well.
The notion that one coach is better at any other at picking out hidden gems is nonsense. It's not that mysterious and it certainly isn't complicated. Some coaches produce better players because they are better at coaching them, not because they are good at finding diamonds in the rough.