The Mighty Mouse was to prove a poor aerial weapon. Although it was powerful enough to destroy a bomber with a single hit, its accuracy was abysmal. The rockets dispersed widely on launch: a volley of 24 rockets would cover an area the size of a football field.
Comments
https://en.wikipedia.org/wiki/Folding-Fin_Aerial_Rocket
Also they had no functional targeting computer or gun sights.
And they were not skilled in the ways of the Force.
They should have used the nuclear Genie
https://en.m.wikipedia.org/wiki/AIR-2_Genie