Humans judge everything, from foods they eat, to television shows they watch, to their individual day-to-day experiences, humans judge it all. Duality is part of the human experience; right or wrong, good or bad, up or down, left or right, light or dark, and love or hate. All of them serve a purpose. From our human perspective, we can't understand one without understanding the other. We need light to understand dark. We need hate to understand love. We need right to understand wrong and we need up to understand down. This is all part of the human experience.