So, can I conclude that you’re saying that your example is “inconclusive”? :)
Seriously, though, the tendency for the WT to cause problems IS genetic, and if it was a survival issue, this tendency would have “evolved out” of our genome before now.
The existance of a tendency towards homosexuality is really a strong counter-example for evolution, don’t you think?
Yes, the example is inconclusive, just as the varying heights of my mother and aunts, cousins and daughters tells us nothing about “evolution.”
In my opinion - which is pretty much as good as anyone else’s judgment on the subject - homosexuality has environmental causes. Therefore, the existence of the tendency or behavior is not a factor in the genetic development of the human species.