Who cares about a minor munitions factory? The destruction of the military headquarters and slaughter of twenty thousand Japanese soldiers was quite satisfactory.
well as the military depots that those munitions were being sent to. As well as all of the soldiers and other logistical support needed to move those munitions.
That is like complaining a tank factory was largely unscathed, as the railheads and location where the tanks were staged for final armaments prior to being sent into combat were destroyed.