Clickbait outrage. The movie showed what the bomb does to people without feeling like it was exploiting the suffering of innocent victims for the sake of a summer blockbuster.

The article even explains how: "In another scene, Oppenheimer gives a speech and, while looking into the crowd, visualizes some of the predominantly white audience as the victims of his bomb."

It's an effective scene. Sometimes what you don't show (negative space) is as powerful as what you do show.