There were a lot of flaws in the inscription methods of the natives. It was quite weak when compared to the schools taught in Noah's world, and it was incredibly slow to apply.
Cultivators had to imprint their wills in materials that suited specific requirements, but the complete product would just become a stronger version of the original item. That result wasn't worth the time invested in the inscription at all.
However, there was one good aspect of that weak method: It was delicate.
It was almost impossible to lose the material during the inscription since the imprinting of the will was subtle and waited for the item to transform by itself rather than forcibly modifying it. Also, the cultivators would choose their materials with great care and use only those that matched their requirements.
'It won't be as delicate,' Noah thought as he removed all the spherical runes from his sea of consciousness, 'But that has never been my approach.'
As you can see, I've slept through 5 alarms today.