I'm tracking what you're saying Fuchs, and agree to a large extent.

The main reason "close with and destroy the enemy" sounds silly is because tanks do it too - drive towards the bad guy and shoot him. Some say only infantry hold ground; if I park a tank on a hill, am I going to be any less effective than a section of riflemen?

Your idea of "a maneuver force suited for dismounted tasks" is a good one and serves as the opposite to Armoured Forces which are "a maneuver force suited for mounted tasks". Both are combat maneuver forces in that their primary purpose is to shoot and move at the enemy in some fashion.

As well, we eventually have to "close with" the enemy to win; we just need to be smart about it and close with him after he's dead. Perhaps "destroy the enemy and close with him" is better....