The protagonist has the fate or constitution of "burial". He buries the past and obstacles, and walks a unique path amidst destruction and desolation.
The inability to sense spiritual energy is a symptom, but in fact it is a certain older and more domineering physique/destiny that is "misjudged" or "suppressed" by the rules of heaven and earth.
In the cruel world of cultivation, you can develop absolute calmness and decisive judgment, and face the world of cultivation without killing indiscriminately but without mercy.