Life often has a habit of throwing the unexpected, both good and bad at us. This goes against our need as humans to see patterns in life (something that helped keep our ancestors alive) and we often resort to relying on predictions to help us have a sense of 'certainty' about the future. Doing so can often set us up for failure and we would be better off focusing on a strategy or rules to navigate the, by its nature, uncertain future.
Believing in predictions allows people to overlook their own ignorance, discount the role of randomness and generally overestimate their own skills. If you think you (or someone you pay) can divine the future, you create the illusion of control and stability, where often there is none. Order is created out of chaos; it is a comforting illusion.