For cultivators, especially high-order female practitioners, giving birth to offspring consumes vital life energy and at the same time delays cultivation, diluting the already 'insufficient' resources.
Not to mention those strong men whose lifespan reaches ten thousand years or even tens of thousands of years, or are eternal, with cultivation realms above the mythical world.
These strong entities have even less desire to proliferate, as they no longer need 'inheritance,' being able to exist eternally by themselves.
This is also one of the reasons why the population of the Human Race remains low.
As for exactly how many powerful beings the Six Great Divine Domains have, Sherry Williams isn't very clear, because each Divine Domain is an independent Boundary, some are xenophobic.
