Why did the author bring Peter and Valentine back into the story in Chapter 9? What assumptions can we make about this world based on the material in Chapter 9?

In "Ender's Game," the author reintroduces Peter and Valentine in Chapter 9 to showcase their growing influence and power outside of Battle School, highlighting how they are actively shaping the world through their manipulation of public opinion using anonymous online identities, while Ender remains isolated and unaware of the larger political landscape he is unknowingly being prepared to navigate.