Metaphysics is a philosophy that deals with issues such as the nature of the universe and life, as well as the existence and meaning of human beings. For some, metaphysics can provide a kind of spiritual sustenance and spiritual guidance that helps them understand the world and themselves so that they can find direction and meaning in their lives. Therefore, for these people, metaphysics is useful.
For others, however, metaphysics may be just a superstition or nonsense with no actual scientific basis or evidence to back it up. They believe that the problems of metaphysics are beyond the scope of human understanding and cognition, and cannot be proved or falsified by the scientific method. Therefore, for these people, metaphysics is useless.
In short, whether metaphysics is useful or not depends on one's beliefs and perceptions. If you think metaphysics can help you understand the world and yourself, then it will be useful to you. But if you think that metaphysics is just a superstition or nonsense, then it is of no use to you. In any case, we should remain rational and open-minded to explore and study different cultures and philosophies, so as to broaden our horizons and cognition.