This is a reasonable speculation as Austin's strength improved, leading to an enhanced understanding of the world and a broader perspective.
Those nuclear bombs once used by the Beastman Royal Court, those guns and cannons, those cars, are very likely obtained from an alternate Crystal Wall System with a completely different fundamental law system.
This is also why those magic inscriptions are needed for protection.
And it is for this reason that the coalition army cannot seize those guns and cannons.
After the nuclear bomb exploded, when Austin arrived at the battlefield, he did not feel the subsequent radiation; everything was just an impact of scorching energy explosion, and afterwards, plants grew normally without any significant abnormalities left behind.
