The problem is economists pretend they are a hard science, while their founding works are largely just assertions from randos in the 1600s. There's no scientific basis for any of it, and plenty of economics still stand on the stilts of things like "rational actors" and other handwaves that they use to pretend their terrible toy models can represent reality. They also do things like define market efficiency in circular ways.
Even game theory sits on top of the throne of "rational actors", meanwhile human beings are explicitly IRRATIONAL actors.
If economics was a functional science, the richest people in the world would be economists. That it isn't is strong evidence that no economics yet has produced strong predictions, which is a rather significant problem for a "science".