My understanding of war at the echelons beyond reality is that it is about beans, bullets, and bodies. The object of the exercise seems to be having more of them at the “decisive point” than the enemy. It could be that a “grocer” is as good at this as a warrior.
The real trick, of course, is finding, or creating, the “decisive point.” Again, this isn’t a talent limited to warriors...
My grocer comment regarded Bradley’s trying to move enough supplies, and basing his, or rather the US’, Euro theater campaign on how much of what got moved didn’t go to Monty. In his memoir he complains that there weren’t enough riflemen because of attrition (that one made it into George C. Scott’s mouth in the movie). At least he didn’t try to deny that he missed the significance of the German counterattack we remember as the Battle of the Bulge. It led to his degradation in favor of Monty, while Patton’s response to it led to his reevaluation and elevation.