Evading pathogen pressure is just another benefit behind the scenes. The point is that I would be careful to attribute any of these things to such weird mechanisms when there are so many much more realistic explanations that we just haven't fully uncovered yet.
> Evading pathogen pressure is just another benefit behind the scenes.
I'm imagining that this relates to a specific pathogen that may no longer exist (like the presumed mechanism of the most common cystic fibrosis mutations and cholera).
I'm not sure how this would relate to humans running, however.
