"Training" in the eyes of cultivators like Zhen Chan and other Ancient Method Practitioners, was always associated with life-and-death crises. It was said that great terror lay between life and death, and one could never understand the heart of diligence and bravery, or the meaning of cultivation, without experiencing this step.
In short—if you don't hang your head on your belt, how can you understand the preciousness of life?
This largely stemmed from the chaos in the Immortal Dao environment during the Ancient Method Era, where phenomena like "this treasure is destined for me" and "spiritual objects of Heaven and Earth belong to those with virtue" were rampant.