Dallas had the better QB by a far higher margin therefore were able to get more out of their weapons. You could put Mahomes with average weapons and those weapons would outproduce putting Brian Hoyer with all pro weapons. I thought the honest goal was to compare the players without factoring in the QB. Your knock on the Seahawks OLine for being no name is kind of part of the problem of Dallas in that all their players are known but known does not mean good nor does unknown mean bad. As an example since you cited the RBs against SF in the playoffs Kenneth Walker averaged 4.2 YPC on 15 carries and neither Pollard nor Zeke last game were close to that and a lot of that was the blocking for Seattle was simply better. While there are more technical ways to look at it, measuring blocking against the same opponent seemed at least fair starting point for a hypothesis.