The fact that you agreed with him when it comes to midfielders.
Jumping, strength are physical skills yes. But Tackeling and heading, arent those technical ? What about marking, anticipating, controlling space, tactical reading of the game, positionning, cutting out runlines and passing lines, managing the space directly behind the central midfielders, decide when to go into duels or just keep an attacker at bay.
These skills dont apply to central defensive midfielders ?
Hence, tactical reading of the game and decisionmaking leading to positionning is what sets apart the absolute cream from the average defensive players, and its by far the hardest thing to do for defensive midfielders, cause they have got all that space to manage, unlike defenders who usually work in small area and rarely get exposed like cdm's often encounter.
The way Ivan Mascherano absolutely destroyed holland and belgium on his own, thats not a motherfucking mindset. Thats because he's the last of the awesome cdms football used to have.