Even when returning home occasionally, it must be as individuals, and never en masse.
Their original duties within the Northern Tribe are now inherited by their families.
This is also the fundamental reason Simon, after subduing the rebellion with everyone, did not return to the Northern Tribe but stayed in the palace to become the Great General.
If so many people returned to the Northern Tribe after quelling the unrest, it would certainly draw attention, and thus the secret of the Northern Tribe would no longer be a secret.
The people of the Northern Tribe have adhered to their ancestral teachings since birth: fulfill their duty, guard the Butterfly Clan, guard the King's Tomb! Even in death, they would never reveal the secrets of the Northern Tribe to outsiders!
This time, so many people entering the Northern Tribe was simply unavoidable.
However, Virgil Davies's people, from the moment they entered the Northern Tribe, were destined to remain there permanently.
