You forget the US military is under civilian control. Civilian control decides if/when the military acts, places limits, sets agenda, determines rules of engagement that often negate the effectiveness of our weapons systems ... often absurdly expensive weapons systems that they approved - sometimes even over the objection of the military. Civilian control is necessary as an extension of foreign policy and domestic safety; micromanagement by civilian authority rather than those on scene is just bad management.
As a vet and generally from a military family, your analysis is both wrong and frankly repulsive.