Defensive football is a synergistic dance between the many layers of a complete unit. While some players are transcendent and can impose their will on any given play, defense is generally regarded as a single-point failure situation where one weakness stands to undo the entire mission.
The Cowboys don’t have such obvious weaknesses. Their defensive plays in harmony with one another, offering high-end play at every layer and daring opponents to find a weakness to target.
The league thought they found a weakness in Dallas when Trevon Diggs was lost for season. Yet with DaRon Bland recently setting an NFL record in interceptions returned for touchdowns, the Cowboys inexplicably replaced one All-Pro with presumably another All-Pro.
The dominance of one layer allows the perfect opportunity for another layer to thrive. And as long as the Dallas offense does their part and puts points on the board, the defense is in position to do what they do best. Make plays.