This is not cheating in any real sense of that word. The computer has that opening book in its memory, so why shouldn't it make use of it any more than Carlsen

This is not cheating in any real sense of that word. The computer has that opening book in its memory, so why shouldn't it make use of it any more than Carlsen is making use of his memory? What's the alternative? Harrison Bergeron-style handicapping of computers, to soothe our human egos?