It’s all idealism.
Reading palms and reading faces is to connect the characteristics of a person’s hands or face with the person’s destiny and future. The characteristics of a person's hands and face are only the physiological characteristics of the person, and the physiological characteristics of the person can only be related to the biological traits of the person, such as the person's genes. The theory of fate is idealistic. Connecting the characteristics of a person's hands or face with destiny is even more subjective and does not exist objectively, so it is even more idealistic. In the same way, linking a person's birth time with a person's destiny also replaces the objective non-existent link with a subjective self-generated link, so it is also idealistic.