Jerome and his group had no idea that Heaven's Creator had directly betrayed them. Moreover, Heaven's Creator knew little himself and was completely unaware of what happened after he left.
So even though they were aware of the strong intelligence capabilities of the Security Administration Bureau, they didn't take it to heart.
"He probably won't come now. Ji Tianqi indeed has special detection abilities, or even the ability to foresee danger."
Harres, based on his own conjecture, tried to compensate for his previous failed judgment.
Jerome agreed to a certain extent, as it often happens that the more one faces the unknown, the more one is prone to fabricate their own interpretations.
Take humanity's view of the divine, for example.
No one has ever seen a god, nor has a god ever stepped forward to declare 'I am a god' and then perform inconceivable miracles; yet people speak authoritatively about the gods.