Since the Realm and battle prowess at the True Immortal level are not the same, why do some people always think that the Realm and battle prowess at the Taoist Monarch level would be the same?
The Taoist Monarch is a Realm, and also a battle prowess. As long as mighty individuals occupy enough shares of the Dao Origin, they can be called Taoist Monarchs; similarly, even if they have mastered enough shares, if they cannot exert such power, they are not enough to be called Taoist Monarchs.
As for the so-called Taoist Monarch Tribulation, it is a test from Heaven and Earth on living beings. After all, when a cultivator masters a certain share of the Dao Origin, their identity will change, and they need to obtain recognition from Heaven and Earth.
For a powerful being like Zhu Jiuyin, who walks the paths of Innate Gods and Demons and Ancestral Witches, the Taoist Monarch Tribulation is not inevitable.