How is Steven and Eunice's argument in this scene like an earlier event with different characters?

Steve and Eunice's fight give us a separate backdrop to the neighborhood, and an insight that doesn't involve the main characters. We can more easily understand the fighting and the yelling in one house when comparing it to a similar occurrence in another. We see Stanley argue with Stella..... and we see him at constant odds with Blanche. Often we think he's a jerk, but then we hear the fighting from upstairs....... and Stella's response to the fact that the police aren't called and Eunice has been seen at the bar, Stella response to that news is to lightheartedly comment that alcohol is a “more practical” cure than the police for Eunice’s woes.