The second fact was that cultivators could exit and act as autonomous extensions of the world of cultivation, both giving it less burden, and allowing it to expand in other ways. In a slightly more… obvious phrasing, just like the Living Realm Fractures would send strange creatures and beasts to invade the world of cultivation attempting to terraform it and change its environment, seeking to claim some of its power, the progression of cultivators who went and found small worlds and claimed them was the world of cultivation's method of expansion and invasion.
It was a bit less direct and the Heavens would rarely be involved, but it still was beneficial to the world of cultivation and could be considered another way to increase the prosperity or 'limit' of the world of cultivation.
