There were things he couldn't say, after all, this was Lin Yun's personal vendetta, and it wasn't his place to decide. Since Lin Yun could let go of these matters, it was a good opportunity for him to follow through on certain promises, thereby bolstering the force to counterattack the Langya Saint Lord and the Ancestors of the three major families of the Human Race.
Anyway, he had never planned to kill those Sanctuary powerhouses. If those six Sanctuary powerhouses could come to their senses, he wasn't unwilling to spare them.
He didn't blame Lin Yun for refusing to let the other three Saint Lords go, in fact, he thought it was a rather good approach.
If Lin Yun said he could spare all nine Saint Lords, not only would it cast doubt in their hearts about the credibility of Lin Yun's words, but their actions would become united rather than divided into two camps as now. Without unity, it would be tough for them to bring their power to bear in one place.