This was because the water-elemental energy and concentration of spirit qi provided by those top factions could not compare to that of the whale fall.
Factions did not regard the Island Whale as an ordinary fey but as a strategic resource.
Some of the factions with sea or trading roles, like Whale Ocean Commerce, nurtured the Island Whales in order to transport goods by sea.
By using the Island Whales, they would not be attacked by sea feys and would be able to trade with the various federations. Hence, there was no need for Whale Ocean Commerce to nurture the Island Whale embryos to the best of their ability.
The number of Creation Masters would not be able to affect the purity of spirit qi and water elements. Instead, the class of the Creation Masters was what mattered. High-class Creation Masters were able to produce spirit qi and water elements of much higher concentration than low-class Creation Masters.