"Because their strength is too strong and their instability too great, what if the other party wants revenge? What then?"
Even some elders expressed more extreme views, suggesting that both major sect disciples from the Middle Three Realms must be dealt with together, while those from the Lower Three Realms should be enslaved. If they want disciples, they can cultivate their own from scratch. As long as they unify the Xuanji Realm, they won't lack time.
Gu Shanhai actually favors extreme measures because powerful captives represent instability.
Moreover, the high ranks of Chengyun Sect have essentially been squandering Chengyun Sect's own lifespan with their recent binge, forcibly industrializing on an unstable foundation, and doing so while persisting in a warlike manner. They need a large population and productivity to compensate for their own deficits.
