Within the universe, many abilities, individuals, species, weapons, technological advances... most of them held fatal flaws.
Take the "Red Demons," for instance,
beings with red skin and bulging muscles, the race that the ship captain belonged to.
In brute physical strength, the species was incredibly powerful, but they were utterly controlled by the Mind Controllers, so much so that for a long period, they served as slaves under the rule of the Yamen at Yatai Empire.
But the "Divine Race" was different.
They needed to possess a strong physical body, a powerful soul, control over energy, and unique technologies amongst other attributes.
In summary, there could be no obvious weaknesses or shortcomings, and more importantly, such powers belonged to a collective, not an individual.
The people presently before them fit these criteria perfectly.
The more they understood, the more they marveled.