Why? Because you go to fortune telling just to see the secret. Fortune tellers, whether they are divining or analyzing constellations, tell you their calculation results, which is a revelation. The good things they told you were wiped out as opportunities for disclosure, and those bad luck were hard to resolve anyway. So the result of fortune telling is not worth the candle.
Some fortune-tellers say that "gentlemen seek misfortune rather than happiness", but it is not that they are free and easy, but that they don't want auspicious days to dissolve out of thin air.
There should be divination at an important juncture, but never ask for divination all the time.