The healer had no business calling appointing themselves a specialist in a field that was new or alien to them. Arwen's compassion while virtuous and seemingly noble is akin to my dog's friendliness and eagerness to cheer me up. His specialty in this thought experiment should be limited only to what he knows to be true and work effectively and the rubbish about him speaking a verbal handshake disclaimer to moloch is where the problem lies. The allegory begs the question that if people's experiences are inherently different works only if we cannot rule out yhat human anatomy and brain chemistry isn't more close to uniform than an alien monster dialogue.