However, once you "bypass" some enemy concentration, you will have to neutralize it one way or the other.
Patton's Third Army dealt with the German fortress town of Metx, the first major German city to fall to Amerivcan troops very handily. Among the other innovations developed by the 5th, 90th and 95th Infantry Divisions was the addition of 155mm self-propelled *Long Tom* artillery pieces and 8-inch howitzers for direct fire into buildings as countersniper weapons. That's one tradition that could be carried on in Fallujah.
See my Post 187.
When Patton reached Metz, the war was still in a dynamic phase. After Metz, there was still all of Germany to conquer. Time was of the essence.
In Fallujah, those jihadis aren't going anywhere. There is no time pressure.
Once the battlefield in Fajullah is shaped so that only jihadis remain, we can blast the infrastructure to rubble by air power and artillery and minimize our infantry casualties.