This was because not many people in the Central Plains knew about the trait of self-belief. After all, only the Holy Poison Sect's Faith Heart Sutra could fuse and nurture the trait of self-belief.
In addition, it had been tens of thousands of years since any cultivator in the Holy Poison Sect had mastered the Heart Sutra of Faith and condensed and nurtured the trait of self-belief. Therefore, many cultivators in the Central Plains had forgotten the trait of self-belief and the power of faith.
The Southern Wasteland was a remote place. Even the few Integration Heavenly Pillars had never heard of the power of faith and the characteristics of self-belief, let alone ordinary people.
Therefore, most people did not believe it at first. They even thought that it was a lie.