It was done to belabor a point. Namely that for a community that aims to be welcoming, belaboring that point can actually make it less welcoming.
It is taxing to participate in an environment where common language usage causes people to take offense where none is given or intended.
In addition to general usage anecdotes (of women using this word to address groups of women), I'm happy to provide dictionary citations if you'd like?
1: http://english.stackexchange.com/questions/11816/is-guy-gend...
Ironically, when it was entirely acceptable to be dismissive of half the race, separate words were used - explicitly calling out a difference between groups. 'Guys' as a gender neutral term is a relatively recent phenomenon, and in many ways is an equalizing term.
> As such, it's probably appropriate to be at least a little sensitive to the topic
Alternatively you could argue that it's appropriate not to be over-sensitive to common, and innocent, language usage.
> The reason I said hostile is that in most discussions on Hacker News and Reddit a lot of people argue that the only reason women are so under-represented in tech is that all the guys are very hostile to women. This survey goes against that. For some reason they refuse to believe that some things are more interesting to women than men and vice versa.