Dropping bombs in space" only requires initial propulsion and trajectory, though I'm guessing their setups didn't have any obvious propulsion launching.

Literally just opened a hatch and the bombs "drop" towards the ship that is "beneath" it.

Lucas had the idea of having them drop bombs like second world war then he realized is retarded and did not do it.

In the last Jedi, someone thought it was a good idea to do that, for what ever reason. I assume diversity hire woman that no one dared to say no to because that would be mysoginistic and is their turn to talk or something.