Witnessing Divine Demon's defeat made the group hesitate to approach the trial. Great Builder's sensors were able to copy the contenders' laws in that unique environment, so the army had to create a proper battle plan.
Noah and the others knew how powerful Divine Demon was. His sudden defeat gave them a clear idea of how dangerous the trial was and how they had to approach it.
Divine Demon had lost due to a physical difference. The puppet carried his law, but its body was a mixture of precious metals that could bring its power to a superior level.
The approach became evident after the experts considered that part. Humans would always be on the losing end in that trial. Only hybrids could have a chance to win.