For people like me who don't believe in divination, all the augurs are good storytellers. They make use of limited information provided by the audiences to tell a reliable story. Think about all the prerequisite, for example, keep the options open, the question can't be too narrow, stay neutral, etc. Of course, the augurs can't tell you which lottery ticket number is going to be chosen. But if you ask an answer for the vague and distant future, they probably will give you a reasonable direction.
As for the Taoism culture, no matter how many times I read it in books, I still feel amazed about how the ancient Chinese use simple numbers and colors to explain the complicated world. The whole theory sounds reasonable and accurate. The way of simplifying and extracting key elements from the redundant message is kind of wisdom without a doubt.