Two fists are hard to match against four hands. The current world has gone through countless Epochs, and in those Epochs, many Ancient Forces have already left their marks in their regions. Although these Ancient Forces usually do not reveal themselves, their strength is unimaginably powerful.
After all, being the Peak Forces of a certain Epoch and having operated in seclusion for several Epochs, their strength has undoubtedly become stronger over time. If it were not for the Deities suppressing them and their inherent fear of the Divine Realm, with the strength of these Ancient Forces, they might have already taken action to seize control of the Main Plane.