If you can wait for good weather (in such a siege the enemy is going nowhere, and no help is on the way for them, so you can wait till the cows come home), and you have no opposing aircraft (cuz 5,000 P51s have swept them from the sky), and there is no AA fire coming from the ground (cuz every time something pops you bomb it until it’s dead)...
then you have a “milk run”. You come in straight and level at 1,000 to 1,500 feet, drop precisely where and when you want.
Bomb accuracy within 1,200 feet from the target is not the case in those conditions.
I’ve said this in every post I think - AIR SUPREMECY FIRST.
Which is what we had at war’s end.
Then bombing accuracy is no problem.
Except for those milk runs where before the AA had held their fire, the aviation commander kept his planes on the ground previously. There was no over-arching intel gathering system, the US was surprised at the Jap OOB after the surrender. The History Channel made a buck off the discrepancy of where we thought the Japs were and where they really were in terms of men and material.
Time and life doesn't stop so the Japanese can be starved to the last man.