A37575: I would agree with you if the corkscrew was used during daylight, but apart from the start and the end of WW2, RAF bombers flew at night, and the corkscrew was developed to evade German night fighters.
I have been in the position many times of trying to follow an wildly evading target at night.
It is not an easy exercise even when one has it visual, and doubly so if the nav is trying to follow it on his AI radar.