Classical economics is built on a convenient fiction: Homo Economicus. A perfectly rational being who calculates risks and rewards with mathematical precision before making any decision.
The problem is, this creature does not exist. We are meat-driven storytelling apes. We buy things because of the story they tell about our identity, not their intrinsic utility. We make financial decisions based on what we ate for breakfast and how much sleep we got. Until economic models incorporate our fundamental irrationality, they will remain elegant math describing a fictional universe.