The allure of the Demon Dao is mostly built upon the temptation of immortality.
Those who have already achieved immortality, especially those who have lived through long ages, witnessing and understanding much, are unlikely to be tempted by the current demon cultivators and fall into the Demon Dao in such a short period.
Otherwise, with the changes in the Heavenly Dao over the past decades, the entire world order would have been chaotic.
Of course, the situation is entirely different now.
The existence of the All Heavens End-of-the-World Civilization Mutual Aid Association has greatly broadened these individuals' horizons, showing them that powerful beings still exist beyond the Heavenly Dao, and even witnessing the formation of Taoist Rhyme, changes in the Heavenly Dao are no longer unbeatable.
Greater opportunities await them.
