After grieving for Hera, it wasn't easy to accept she was actually alive. The pain from her death shattered every Reaper's heart, especially the core members of the crime organization. For them, she was the most important person in the world. Ideally, the news that she was alive in Heaven Liu's body would be good news. But this was reality. They lived in real life and not just in a fantasy world.
Therefore, no one in their sound mind would believe it with a snap of a finger. Mindlessly believing something out of this world was ridiculous. They couldn't be so careless, knowing this could lead to another painful heartbreak.