The reality is social sciences are inherently more complex because they are higher-level problem spaces. Biology in merely a stepping stone to psychology, like

The reality is social sciences are inherently more complex because they are higher-level problem spaces. Biology in merely a stepping stone to psychology, like assembly to modern Java. Assembly is simple, understanding how the JVM works is hard. Psychology intertwines just about every field you can imagine. Anthropology, neurology, biology, chemistry, you name it. They're fundamentally working on a level much, much higher than the hard sciences. So the sheer amount of variables is absurd, but also how they work together.