Within the planes of the heavens, beings above the 'Daai Law Golden Immortal' level, upon entering the mortal realms, will become tainted with worldly burdens, which can lightly affect the progression of their cultivation, or heavily cause their cultivation to stagnate indefinitely...
And this also makes many beings above the 'Daai Law Golden Immortal' level concerned about their descendants in the mortal realm, yet lack the courage to return.
Even if it's just to leave behind a celestial artifact for their descendants, or one celestial realm Divine Ability...
However, this, for some powerful factions in the celestial planes, is practically nonexistent.
Just like the great opportunity received by Little Gold, Little Black, and Little White, the 'Inheritance Blood Pool', which is a treasure personally crafted by a prominent figure from a major force in the celestial planes, and then placed by his envoy into the mortal realm.
