If Earth truly was the World of Cultivation from the past, new questions arise. From Xuanhuangzi's records, Yan Fei found that the people of the World of Cultivation could enter the Cosmic Starry Sky on their own, and when facing the vanguard of a High-Tech Civilization, they could easily kill their opponents. Cultivation Experts of such caliber require vast resources to be nurtured. Considering Earth's resources, which are hardly abundant, even raising a single Cultivation Expert would be difficult, let alone a multitude of them.
The World of Cultivation had developed for over ten thousand years and had even ventured into the Cosmic Starry Sky. Yet, whether on Earth or on other planets in the Solar System, no traces of activities from a Cultivation Civilization have been found. For a species capable of cosmic expansion, would they really overlook the planets right at their doorstep?