Surfing can make the world a better place. Or at the very least, it makes life so much more enjoyable. Being a wave rider for more than half my life, I have experienced this first hand. And as with martial arts, I have found that the lessons learned in the water overflow into other areas of life.
This especially helps with with flexibility, improvisation, and the ability to gracefully navigate the ebbs and flows of life. Being in tune with the elements puts us in harmony with the rhythms of nature. This helps with decision making, and can teach us how to respond intuitively to unexpected situations.
And the feeling of deep relaxation that comes after a good surf is a meditation in itself!