Because the point is that we have no 1 and only way to live, 1 and only way to connect with the people. We do not have 1 and only god, we do not have one and only point of view and one and only way to do things.
Nothing like a creative world can let you get this theory. And traveling around the globe as I did in my life let you get the point straight.
But the respect for any other culture show us the way, 1 and only, to grow up, to be the man or the woman we always wanted to be.