Oughtn't it be your advice for people who have, as you put it, "a destiny to catch," whether they think they do or not? [and] What would you say to someone who gives up attending to their identity as "the person trying to achieve X" and instead focuses their attention on increasing the odds of X occurring, without reference to who achieves X?

This was advice for people who want to do something exceptional with their lives, have some idea of what it is, and who receive little or no external reinforcement for that aspiration. In such a situation, it becomes entirely up to you to avoid internal and external distraction, and to provide motivation... I suppose you could say all this to a person who you believe to "have a destiny", but that's not what I had in mind. As for the second question, if assisting the accomplishment of X is the most important thing you have to do, then it would make sense to "centralise" on that.