No, that is what evolution teaches.
Now, it may be independently the case that genetic diversity creates a healthy population.
But what evolutionists TEACH is very specifically that animals and individuals SELECT their mate based upon characteristics that are perceived to be SUPERIOR to others. This causes evolutionary characteristics to dominate, and less adaptive characteristics to die out. That is the essence of evolution's process of NATURAL SELECTION.
While it is coincidentally true that genetic diversity provides the opportunity to choose the BETTER over the WORSE candidates, evolution DOES NOT teach that animals or individuals SELECT a mate on the basis of creating genetic diversity.
What evolution teaches to the average woman who already feels disrespected is that other women are BETTER than she is, and will be chosen to IMPROVE the human race by getting rid of her, kicking her to the curb, rejecting her, and eliminating her characteristics from the human race.
No, that is what ignorant creationists teach about evolution - it is not at all a precept of evolutionary biology that there is only ONE trait that is “Superior” and all others are “Inferior”.
Some traits are selected for by the environment and/or mate selection - other traits are selected against by the environment and/or mate selection.
Add to that the fact that mate selection tends to be associative - and you find that short people tend to prefer short mates - tall people tend to prefer tall mates - dark haired people tend to prefer dark haired mates, etc, etc, etc.
People tend to mate associatively for incisor length as well - although I have NEVER said to myself “Have you checked out the incisors on THAT babe?”.
So it is not the case that only ONE trait is perceived by potential mates to be superior in all cases.
A short blond male may prefer a short blond female over a tall brunette. I am tall and dark haired and I prefer a tall brunette (in general) to a short blond.
That being the case, how could one say that mate selection determined one female to be superior and the other as a candidate for removal of those characteristics from the human race?