Unless one saw with their own eyes and experienced it personally, no one would believe that a Shattered Void with only a hundred years of ascension possessed the strength to suppress a top-tier Shattered Void.
Just as even though many folk videos had been circulated, no one would believe in the existence of the supernatural in this world.
It goes against common sense.
Compared to concepts instilled by others, people tended to believe what they wished to believe.
The Guiye Demon Lord was the perfect example of this.
Of course, with the precedent of the Eight Desolates and Hei Tian Demon Lords, this Demon Lord still sought support from the Sky Prison and Assassin Demon Lords, with whom he had good relations, at the first opportunity.
However, among the two Demon Lords, the Sky Prison was somewhat better off, being the closer one.
It would evidently take the Assassin Demon Lord some time to arrive.