J. Robert Oppenheimer was an immensely complex figure, and the movie's based on a biography of him. While the movie is historically accurate in many ways, there are a few bits of fiction mixed in.
You're still having fun though — you ... You head to the movie theater for the 11:00 a.m. showing of "Oppenheimer." On the way there, you're blasting Radiohead in your noise-canceling headphones.