Noah had heard similar words before. Chasing Demon had already explained the difficulties connected to a broader individuality in the banquet held to honor the return of the Demons.
Heroic cultivators generally specialized in the aspects of their individualities as they grew. Their existence would then become able to affect the laws linked with them until they finally turned into something unique that didn't exist in the world.
Of course, the process would take more time if the individuality was vast and expanded in many fields.
It was a simple matter of quantity of laws. Wider individualities needed to learn how to wield more of them to become something unique.
However, cultivators had limits. Worlds could contain as many laws as they needed to work, but heroic existences were far below that level.