I don't think anybody can Wyche.
One of the things that's probably kinda hard for the youngins to understand about us old farts is we grew up in the 3 yards in a cloud of dust era. The 70's and 80's hell even into the early 90's.
Hell my HS team might have averaged 5 - 7 passing plays a game. And it wasn't just HS, college and even pro was run, run, run.
John Riggins, Tony Dorsett, Walter Payton, Herschel Walker, Earl Campbell, Larry Csonka, Mercury Morris, Franco Harris
Archie Griffin, Pete Johnson, Ickey Woods, James Brooks and many others.
And many times play action passing would bust guys wide, WIDE open. Offense has just gone in a different direction. Another thing is defense's could actually play defense back then.