Although DiMarco's encounter had already indicated that Star Cluster Hall appeared some time after the Old World was destroyed, Jingnian's words were still rather valuable.
First, this confirmed that the Old World's destruction had brought about a batch of human Awakening. Or rather, a few people had Awakened during the Heartless disease outbreak. For example, DiMarco or someone in the Monks Conclave.
Second, Jingnian mentioned that the difficulty of Awakening had decreased with the appearance of Star Cluster Hall.
This was clearly not random talk. There had to be the corresponding evidence.
Jiang Baimian could even guess why Jingnian said that.
Some of the people in the Monks Conclave—who had previously been unable to Awaken—Awakened after Star Cluster Hall appeared.