Acharya Prashant explains that practice is indeed useful and aligns with the teachings of Shri Krishna in the Bhagavad Gita. He emphasizes that the practice of not giving importance to one's selfish motives or desires is beneficial. He suggests that one should treat themselves casually and avoid taking themselves too seriously, as the ego is often driven by base desires. This casualness serves as a necessary resistance against the constant societal pressure to value oneself excessively.