Er, no, it's pointing out a selection bias which means that anyone inclined to take the existence of this person writing about "why there are no girls in SF" (p

Er, no, it's pointing out a selection bias which means that anyone inclined to take the existence of this person writing about "why there are no girls in SF" (plus, I guess, the apparent shortage of people writing about what a great place SF is for heterosexual men to find partners) as evidence that SF is (functionally) very short of women -- which, let's face it, lots of people would -- should think twice before doing so.