Gloriana provided Ves with several suggestions on how to resolve Silent William's inability to advance to expert candidate.
Neither of the options she mentioned so far inspired confidence in Ves. Operating on someone's mind and spirit was an extremely sensitive act that had far-reaching effects on someone's psyche and personality.
He understood far too little about humans and the human mind to consider himself an expert in this field!
Due to his concerns and apprehensions, he found it difficult to come up with solutions on his own. This was why he welcomed the input of an outsider like Gloriana.
Her lack of understanding in the spiritual field aside, her ignorance granted her a fresh and untainted perspective towards the problem Ves was facing.
Sometimes, all it took to solve a complex problem was a simple but novel solution.