I know exactly what you're saying, and I addressed it in my post. He's building up to that because Jon's starting from a position of what he's learned from his dad. This works as both character exploration and a good way to leave the new reader on familiar ground to later move into uncharted waters. They're coming in with already ingrained notions about what Superman does and means, and this opening presents that, shows its flaws, shows that Jon doesn't agree, but is conflicted because it's what he knows, and lights the small spark that will lead him and the reader away from that style of thinking. Again, it's new reader friendly, and it's character driven.
Das mah boy! Ya just love ta see it