When Ves initially came up with the Aspect of Rationality, he never envisioned he would use it for interrogation purposes.
The Aspect of Rationality was originally supposed to provide assistance to professionals such as Ves and other specialists. By stripping their chaotic emotions and leaving them to think logically, the organic statue had the potential to facilitate a lot of breakthroughs in difficult projects.
The point was that Ves always thought of the statue as a tool to help his own people!
Of course, its extreme effects could be harmful if used in the wrong circumstances. That was why he restricted its use and became very selective about who was allowed to experience its unique glow.
Ves never thought about using it on his enemies. Why should he give his opponents a favor by allowing them to sober up and think much more clearly about their own problems?