Can fortune telling only be used as a reference? Why can fortune telling be taken seriously?

Is Zhou Yi's fortune telling generally reliable?

Accuracy lies in oneself, and fate is just a rule, just like my cup. If I let go of my hand, the cup will fall to the ground. Everyone knows this and it is also the most basic prediction. But if I don't let go, the cup won't fall. In other words, life is the same, just the law of your life. If you don't give full play to your subjective initiative, this rule can't be realized, just like whether a cup can fall or not, the key is whether you let go. Similarly, your life depends on how you walk.