Why is the prisoner's dilemma subverting traditional economics?

Because in the past, economic consciousness was based on subjective thinking, and people speculated on what, so what. Game theory, as a theoretical tool, appeared after economics and introduced mathematical tools into economics. And developed into a necessary theoretical tool, subverting the traditional economic thinking. However, there are still some economic schools that oppose the introduction of mathematics into economics. So after introducing economics and game theory. When using the basic ideas in game theory to analyze the basic problems in reality, a lot of calculus knowledge is needed, which changes the traditional economic thinking mode. So now the mainstream economics school thinks that the emergence of economics has subverted traditional economics. In fact, personally, this school of economics may even be classified as science and engineering in the future. Because the mathematical knowledge and ideas needed in it are very complicated.