Sanctuary (or perhaps just area) denial operations at the Afghanistan village level

[Ken White]

So effective COIN goes against our human nature. Effective conventional warfare is at the essence of our human nature.

Highly disputable. Machiavelli and John of Islay among others plus the survival of Byzantium for Centuries would seem to be but three examples refuting your first assertion. Your case for it assumes a degree of selfishness that is not universal and is peculiarly western in large quantities. You also excluded third party interventions which are, as 'humanely' practiced in a 'limited' war, a western proclivity and which muddle your position...

As for your summation, I suspect the survivors of the conventional battles at Peleliu and the Hurtgen Forest might strongly disagree. In fact, given the overall history of US Arms for the past 264 years, it seems our net effectiveness at it is at best questionable. As Jon Custis once noted, we have been fortunate that our opponents have been more screwed up than we have...