Age of Ultron understood that criticism. Quicksilver and Scarlet Witch are survivors of violent warfare in order to introduce the Samuel L Jackson hold on to your Butts shirt . Scarlet Witch uses her power to convince as many people as she can to flee the city before the battle. And then the majority of the fight is actually taken up by the Avengers working to save civilians. At one point Captain America literally says, “I’m not leaving this rock with one civilian on it.” From the perspective of the movie, a superhero’s primary mission is to save civilians and only fight robots after the civilians have been saved. It should also be noted that this was true in the original Avengers movie. Captain America creates a plan to minimize civilian casualties and then after the battle we are told how the Avengers saved various groups of civilians.