The main reason that people make attributions that reflect the just world hypothesis is that these explanations

These explanations "make people feel safer and the world more comprehensible".

The just-world hypothesis otherwise called just world fallacy is the cognitive inclination or supposition that a man's activities are innately disposed to convey ethically reasonable and fitting results to that individual, to the finish of every honorable activity being in the end compensated and every insidious activity inevitably rebuffed.