I'd go insane if the world was black and white. Nothing's more soothing than color.
What would I introspect on anymore? What would be the worth of writing those dumb essays for my English class? That variability is what keep things moving forward. If things were black and white the world would become stagnant and unfulfilling.
I think it's part of human nature to ask questions and seek answers and learn about the world around us. If we knew every answer to every question then we'd lose our curiosity and we might live our lives as completely different people.