I'm generally sceptical of twists; often they tend to be become rather shallow in execution and far too dependant on a prior shared understanding of...
I'd say that is a convenient excuse, but one that doesn't hold up. Off the top of my head, I can think of three or four novels with strong romance—or...
«Speaking generally, it is because of the desire of the tragic poets for the marvellous that so varied and inconsistent an account of Medea has been given out» (Diodorus Siculus, The Library of History [4.56.1])