The character Graff in "Ender's Game" intentionally isolates Ender to create a challenging environment that forces him to excel beyond his peers. Despite the hardships, this strategy aims to enhance Ender's abilities and ensure he earns respect and acceptance, which he might not achieve simply by being competent. This method ultimately transforms Ender into a superior soldier compared to what he could have become in a different social setting.

However, this isolation exacts a heavy emotional toll on Ender, leading to feelings of loneliness, fear, and anger. These negative emotions contribute to a lack of trust in others, yet they also serve to sharpen his skills as a soldier. It raises the question of whether the sacrifices made in the name of excellence are worth the personal struggles that accompany such intense pressure.