The answer was partly already given to you here …
Also youre looking at things from a casual/simple pov with all due respect. Yes there are times when a player can make an impact by burying the QB (like 54 vs KC this year against Smith/Hunt I believe but overall again its a very simple way of looking at things. The big thing that KS was trying to get across was with the right personnel you run anything.
And variations go back even further when you consider where/who he learned it from and eventually adapted to his preferences. If you just started watching football 2-3 years ago I could see this line of thinking but its 2018.