There are no birds in the mountains. What does it mean that sparrows are king?

Sparrows are one of the smallest birds, and they are all kings, indicating that there are no bigger birds in the mountains. This means that there are no sages in the unit, and those mediocre people without virtue and talent have become leaders. Sparrow (the Latin scientific name of Passer) is the general name of 27 species of birds in the genus Sparrow.