There was a fundamental difference between someone at the Peak of Divinity Transformation and someone who was Half step into the Soul Integration Realm.
In the Divinity Transformation stage, a cultivator needed to refine the Nascent Soul slowly into the Primordial Spirit.
Indeed the Nascent Soul wouldn't directly transform into a Primordial Spirit after surviving the Heavenly Tribulation.
But the cultivator needed to assimilate their comprehended Laws into their Nascent Soul to progress through the Deity Transformation Stage.
The small stages of Nascent Soul stage could be broken through with the Nascent Soul reaching a saturated stage after absorbing enough Spiritual Energy.
But each small stages of Divinity Transformation stage needed carefull and lengthy process of refining.
