Justice does not give anything. It only prevents some injuries. A pre-occupation with fairness never makes anyone happy. It can only help us avoid some injustices. Imagine that our life's goal were to build mountains.
Love creates mountains.
Love lays foundations, throws up peaks, dashes streams between them, and spreads a sky to cover it all. We can spend our lives filling in holes, or we can build mountains. As we insist on fairness, we're completely missing what matters. Justice is absolutely meaningless compared to learning how to love each other. In fact, it is often from injustice that we learn to love each other.