You're taking that sentence out of context. I was referring to the vast majority of games being won or lost based on whether you pass better than your opponent -- that is true no matter who is in the backfield (meaning the running back). If Adrian Peterson is in the backfield, it's still true. If Emmitt Smith is in the backfield, it's still true. If DeMarco Murray or Ezekiel Elliott is in the backfield, it's still true. No matter who is in the backfield, and no matter how well or how poorly they are running the ball, the game will still almost always be won based on which team is more effective passing. That doesn't change depending on who is in the backfield.
As far as the rest of what you said, it's irrelevant to my point. My point has NEVER been about the running back position. It is only about the overall efficiency of the running game. Running backs obviously contribute to the passing game as well and in short-yardage situations (when rushing success actually matters). And the personnel moves any team makes don't change the facts. The decisions the Cowboys in particular make certainly don't change the facts. What a specific coach or analyst thinks doesn't change the facts. The facts are the facts.