I don't know what it means to say one is "created to be" anything. It's certainly a theological statement rather than a scientific one, but even at the theological level, how does one rebut an argument that says, for example, that one has been created to be polygamous, or an ephebophile, etc.? 
I think it's better to speak of an orientation that is part of one's self-awareness, without attempting to bring creation into the picture.  Each of us has been created, but how we've developed in response to our own bodies and the world around us, is not theologically determined, in my opinion.