I find it interesting that the principle behind the practice of medicine is directly opposed to evolutionary theory. According to evolutionists, the idea of human nature is an illusion. What we term human beings is only a name for an arbitrarily determined number of interbreeding creatures with various and perpetually varying characteristics. In principle, it is impossible under the rubrics of evolutionary theory to describe human nature.
Conversely, the object of medicine is the restoration of the proper operation of the body. This obviously presumes the fact that there exists such a thing as the proper operation of the body and various bodily systems, and that all people know this. When you go to an eye doctor you expect him to fix your eyesight, not to tell you that your eyesight is evolving into a higher life form bent on preserving its genes.
Lots of confusion, of course, as to what constitutes the proper function of sexuality and reproductive organs in the context of human nature. And I've even seen FReepers dispute as to whether hermaphroditism, deafness, blindness, etc. are to be called "abnormal" or, alternatively, "normal variations."
You've said it much better than me, when I've tried to point out that 'believers' in E do NOT follow their 'belief' when going to the doctor!