Why Is Spiritual Practice so Difficult?

At the beginning, I encountered a dying old man with white hair, but this bad old man refused to die. Two sect elders finally arrived, but the village chief almost led his men into a fight. Finally, he entered the sect, but he was not given any skills. Isn't it just practice? Why is it so difficult—— The sect finally entered, the exercises were finally mastered, and the skills were finally in place. It's just that Wu Shi fought for it himself.