It’s an unusual phrase, “The elephant in the room”, isn’t it? I mean, it works in some ways, because it’s something that everyone is fully aware of – how could you not notice an elephant in a room? – but if there was an actual elephant in a room I was in, I would probably want to do something about it. Like quite possibly leave the room. Elephants don’t belong in rooms and therefore, an elephant in a room is likely to be rather pissed off.