In the world at large people are rewarded or punished in ways that are often utterly random. In the garden cause and effect labor and reward are re-coupled. Gardening makes sense in a senseless world. By extension then the more gardens in the world the more justice the more sense is created.
I am still a victim of chess. It has all the beauty of art - and much more. It cannot be commercialized. Chess is much purer than art in its social position.