They intervened not because those forces were insufficiently powerful and unable to deal with the Sea Clan, but because they saw that the great battle was about to end and wanted to snatch some credit and Spiritual Objects!
However, the forces that were robbed did not dare to say anything, because offending the Cave Abyss Sect would likely make it impossible to survive anywhere in the realm of East Continent Immortal Tao.
It's not that the Cave Abyss Sect does not have opposing forces, but no one would confront the Cave Abyss Sect for the sake of a minor power in Void Refinement or Integration.
Such domineering actions caused all forces to take notice and further lost the admiration and respect of the minor powers in Shanyuan State and Wanzhu State.
