The Jiang Chen that perished together at eight ninety-one

Too many Taoist Masters of the Human Race were sealed within the Fire Cloud Cave and could not escape; only a handful of Human Race Taoist Masters, for various reasons, had not gone to the Fire Cloud Cave and thus were not sealed inside.

After the Mystic Sect's Great Divine Transcendents began the sealing of the Fire Cloud Cave, what consoled the Three Emperors and Five Sovereigns the most was, thankfully, very few Quasi-Saints had gone to the Fire Cloud Cave for secluded cultivation.

Quasi-Saints of the Human Race, for various reasons, were mostly not in the Fire Cloud Cave but were guarding various secret realms, suppressing fierce beasts within to prevent them from causing trouble.

Otherwise, if all the Human Race's powerhouses were gathered in the Fire Cloud Cave, and if they were blocked inside and could not come out, the Human Race would inevitably be thrown into chaos.