This is because the world source can only be used by the world and its creator.
Otherwise, after King Qingzhi invaded the Giant World, how could he not have touched the world source of the Giant World?
Moreover, there are limitations on the use of the world source.
For example, a lower-level world source cannot be used on a higher-level world.
For instance, Xu Zimei's Divine Continent has a large world source.
Therefore, to absorb other world sources, it would need to be from similarly large or giant worlds.
Small and medium-sized world sources are useless to the Divine Continent.
It is precisely because of these restrictions,
that large worlds are prevented from wantonly plundering the small and medium worlds.
Otherwise, if any world source could be used,
then perhaps all the small and medium worlds in the cosmic would be difficult to preserve.
This would also become a disaster for the entire cosmic.
