So, planning ahead and massively spending and dedicating to a weapons programs isn't that productive.
Carpet Bombing with General Purpose Bombs was Not Effective and it was only a change in tactics by General Curtis Lemay that Proved that Incindiary Bombs would be More Effective.
Other than that If not for the development and expense on the B-29 we would not have had bombers with the range to attack the Japanese mainland in the first place.So Planning ahead is very Important as is spending on development of aircraft if its done wisely.
Even after the B-29 we still had to Conquer a little Japanese Held Island known as Iwo Jima so we could turn it into an Emergency Airfield so the Damaged B-29’s would have a place to go instead of ditching in the ocean.