His knowledge of formation was first tested by the formation management department. When he had passed the test and proved that he was reliable, he was then given tools to do his job.
The most important tool to inspect formations is still the divine sense. Without it, one would have to rely on their eyes to examine the conditions of formation engravings. That just won't cut it.
Even if the accuracy of the eyes is ignored, the eyes can only see 2-dimensional layers. The eyes can only see the surface of objects. The eyes can't see other information such as texture, temperature, energy level, energy quantity, energy flow, and so on and so forth.
A classic handicap of the eyes is their inability to see formations stacked on top of each other. This is why someone who uses their eyes to examine an object like the sect ID card would believe that they could replicate the ID card when, in actual fact, all they are seeing is one layer of the ID card.
