If the Great Barrier were to fail, the passage between the Gana Continent and the Vast Ocean would open, which would inevitably drag the Holy Armor Dragon Kingdom into the conflicts of the "Ancient Continent"... Just like a millennium ago!
This catastrophe wouldn't just disrupt the current order of the Gana Continent; it might even destabilize the foundation of the Holy Armor Dragon Kingdom!
However——
They could also consider it from another perspective.
The struggle between Saint Sis and the Netherworld God has persisted for a millennium. If neither side claims victory yet, the "Ancient Continent" must be in ruins by now.
In contrast, the Gana Continent flourishes, with abundant resources, strong soldiers, and thriving national power... If the Great Barrier is lifted, it's uncertain who will bully whom!
The Elder Council of the Holy Armor Dragon Kingdom is already too crowded.
