Some opinion say that Hashem created the world to bestow goodness on man (and couldn't just place him in the Garden of Eden because it would be "bread of shame" - that man would get things for free).
According to those opinions, why didn't Hashem just create man in such a way that "bread of shame" isn't shameful?
As man's nature is also a creation, the concept of "Nehema Dechisufa" is also a creation. Hashem could have created man, placed him in Gan Eden, not have him work, and make his nature in such a way that "free bread" is not shameful. So why place man in this world?