There were no saints left in the Primordial World, yet the world burst forth with a vitality reminiscent of the very beginning of creation.
Saints were beneficial to heaven and earth, but to the Primordial Beings, they were, from a certain perspective, a net negative.
It was much like how nothing grows beneath a giant tree!
The Principles of the Dao cultivated primarily by a saint meant that the moment he attained sainthood, the path of that specific cultivation was cut off, extinguishing any possibility for others in the world to attain the Dao.
At the same time, the method of proving the Dao as a saint became increasingly difficult for those who followed.
For example: after Nüwa created humans and attained sainthood, Nether River and the others trying to imitate her was tantamount to wasted effort.
Then there was the inherent flaw of human nature.
As long as a creature possessed thought and self-awareness, selfishness and fear would exist.
Those who boarded the carriage first would not wait for latecomers, but instead weld the carriage doors shut, preventing others from boarding and causing overcrowding.
Why did Kunpeng sell his services to the Demon Court for a thousand years?
It was simply because the moment he began his ceremony of proving the Dao, he would immediately face attacks from all the saints, who would forcefully block any possibility of his success.
Therefore, he needed to secure protection from Dijun and the others; otherwise, he could never attain sainthood.
Moreover, after attaining sainthood, saints would also usurp a vast amount of the world's resources.
For instance: before proving the Dao, the Three Pure Ones of Daoism crowded together on Kunlun Mountain. After successfully proving the Dao, Taishang went to Mount Shouyang, and Tongtian went to Mount Jintao in the East Sea.