Apart from those Pope-level entities, there must still be a large number of elemental spirits on the top of Sacred Mountain. Judging from the current situation, it is clear those elemental spirits have been in a desperate fight with those monsters, where both sides have suffered. From this point of view, it's understandable that those elemental spirits cannot muster any more strength to resist Zhou Tian.
However, what concerned Zhou Tian greatly was the immense power wielded by the elemental spirits below. If they joined the fight, given the current situation, they would undoubtedly turn the tide of the battle. But as it stood, it seemed like those elemental spirits intended to use him to confront their own kin, a development Zhou Tian could not ignore.