Destiny doesn't require a guiding intelligence, but it isn't random either. Look at it etymologically: "destiny" is related to "destination." The idea behind destiny is that you're following a path toward a certain inevitable or necessary fate. It can be determined by divine will or simply by the inbuilt rules of the cosmos; the word itself doesn't require it to be either one. It just means that you're moving forward through life toward a specific goal, whether you know it or not, whether you try to avoid it or not.