It would be a perfect cover by Romm to be a conman so that he can convince the spirits that he can't actually see anything while still being able to protect himself.
That being said, if he could see these as vividly and for as long as Miko could, which it seems he could... I could see why he'd go completely and utterly insane, too, or at least be an inch away from losing his sanity.
Also, Romm seems to have had an encounter with the same "shrine" that Miko did...