It wasn’t leading the story anywhere, it was a plot contrivance that hamfistedly side loaded a “war profiteering bad” message that’s been in Star Wars since at least the Clone Wars and done far better there.

Not only that, but the concept is being explained to the child soldier turned rebel as if he doesn’t know that it’s bad. He should be the one explaining it to Rose, but we can’t have that because she’s a girl boss with no obstacles to overcome or ignorances to set straight. All of her problems are external and no further self improvement was possible.