Most of it was for auxiliary cultivation.
It was indeed possible for an incarnation to reach the Ninth Tier; it had happened many times before.
The Ancient Divine Stone, born with Nine Orifices, possessed spirituality but lacked spiritual wisdom, making it a top-tier Heavenly Material and Earthly Treasure.
These artifacts, although possessing high spirituality, did not develop spiritual wisdom.
These truly existed.
However, the vast majority of incarnations had no possibility of advancing to the Ninth Tier.
Yet, this was in the past. Nowadays, with this special Incarnation Technique, ordinary means couldn't reveal that it was an incarnation at all.
Its Divine Soul consciousness and physical body were complete. In theory, it was indeed possible to advance to the Ninth Tier, not without opportunity.
