I think there was a shift in the face of the battle in WWII the Allies knew who they were fighting they were either the Germans, Italians or the IJF in regards to our foes they faced the dilemma of 5th columnists & commando raids tying up resources.
The rules for engagement were different back then I mean what power in todays world would carpet bomb civilians! (Operation Point Blank.)
They had a task to do at pretty much any cost I shudder to think if the D-Day landings had not gone the way it did they deserve histories highest accolades for sticking to a most horrid task the sheer grit in knowing or seeing your buddies killed beside you when the ramp dropped and Hitlers Buzz Saws (MG42's) got to work.
No sir they like their Fathers & Grandfathers did what had to be done for the sake of Peace & Freedom for all.
"The integration of American and Britishbombing strategies was formalized in January 1943 at the Casablanca Conference in a directive that laid the basis for a ‘combined bomber offensive’ in preparation for the invasion of Europe and the opening of the second front. Put into effect in June 1943, Operation Pointblank, as the combined bomber offensive was eventually called, appeared critical to any successful invasion and ground campaign, since the limited Allied ground forces would require clear air superiority and would benefit from a weakened Wehrmacht."