How do fortune tellers solve the paradox that fortune-telling behavior will inevitably bring?

Buddha said that people have fixed jobs and irregular jobs. The career is mature and cannot be changed. It is possible to change the leisure industry. Therefore, fortune-telling may not be allowed in the part of uncertain industries. However, the premise of 1) reform is that one can break away from the original habits. The so-called leopard cannot change his spots. Can you do it? 2) Change is often a degree difference, and it will not be completely inaccurate (except for poor fortune-telling). Besides, fortune telling is mainly qualitative, not quantitative.