This is for anyone that has seen Rogue One, so read the spoilers at your own risks :)
the Rebel fleet attacks the planet hosting the Imperial archive, they have to deal with the protective force field and its gate.
We see them using
bombs against the entry force field, but I don't remember seeing them using bombs for the gate itself.
Why not use
one of the EMP bombs on the gate itself, as it seems to be pretty effective against the Destroyer, and prove beforehand that it is not useful?
The imperial engineers may certainly have thought of that, and made the gate sturdy in that scenario, but I truly don't remember any of my suggestions above occurring in the movie.
Is there perhaps another reason that eluded me?