The environment alone can directly determine the impact of the same loss on a particular faction.
If this were in the Lower Realm, and so many Deities were mobilized to deal with Zhou Tian, perhaps any faction would need to carefully consider whether their decision was worthwhile. After all, Deities in the Lower Realm are far too scarce, and bearing such losses to fight an enemy like Zhou Tian—this is not a decision that most people can make lightly.
However, if the same situation were placed in the Divine Realm, then at that time, the command given by the leading Deities didn't appear abrupt at all.