Izzy's "Why" is about the gap between the life a person has and the one they long for. Each night the speaker dreams of perfection: a flawless body, great friends, a family that understands, good grades, even a perfect house and world. It reads like a list of everything the speaker feels is missing.
The turn comes with "even in that world / I feel absurd." Even in the dream, the speaker can't feel at home, which suggests the problem isn't only the things they lack. The poem hints at deeper insecurity, a feeling of not being enough, though it never says exactly where that comes from.
The ending is circular. The speaker lives their ideal life only in dreams, keeps crying, and keeps asking "why" without finding an answer. The repetition of that word makes the mood heavy and stuck, full of sadness and quiet frustration. The poem doesn't offer comfort, which makes it feel honest and raw.