Whether the Netherworld Emperor broke through to the Spirit King Stage or not, he had to go down and kill him. Otherwise, the Emperor would become an endless scourge. What he had said came from the bottom of his heart—he hadn't painstakingly cultivated the Celestial Cloud Mansion just to send its members to their deaths.
He had to be responsible for everyone. If he failed to kill the Netherworld Emperor this time, the Emperor's future retaliation could result in countless casualties—something he couldn't bear to see. He wasn't saying such things to win people over; he truly had to be responsible for his subordinates.
Their side had suffered relatively few losses during this grand assault, but there were still casualties nonetheless. People always die in battle, but the least he could do was keep those losses to a minimum.
Otherwise, if they waited for the Netherworld Emperor to send his forces to attack, their losses would be anything but small.
