Actually many human Emperors had wanted to flee because the Emperors of the demon race didn’t just outnumber them, the Emperors of the demon race were stronger than them as well. But they were very clearly aware that Heaven Pillar Peak would be finished if they fled. Once Heaven Pillar Peak was breached, the human race would be finished. Because it was the last natural barrier that the human race had!

So, even if they knew they were no match for the demon race, they were still ...