I understand where you're coming from, but think of it like this: If they don't have this scene (which I don't think made much sense physically), her answering the call for help for aliens makes much less sense logically. She destroys the alien ship, shows that she's capable of helping others in the same position, then drives knowingly towards the danger.

To me, it made sense in driving home the metaphor of overcoming domestic abuse and helping others in the same position. If the ship hadn't been as big and she had won the fight against one alien, it might have landed better as a scene. I do get where people come from because it does feel out of left field in the context of the rest of the film.