We don't. Especially in the tech community, everyone is assumed to be male by default. There was a post not two days ago by a woman programmer showing that a common complaint among men is that women "don't contribute technical articles". News flash: they do, but the commenters ignore the possibility that an anonymous blogger might be a woman and refer to the author as "he" anyway.
We simply do not live in the world you describe.
> To me you sound incredibly sexist.
Funny how sexists always say that to people who call out sexism.
> Sorry, but I don't divide up the world like you do.
Right, you'd rather completely ignore the issues facing this community.
> Are you saying that if a Woman made that list all is well?
In short, yeah. It's creepy for men to compose a list of 'females' without their consent and make it opt-out.
> Why does the gender of who made the list matter?
Because the tech community is utterly plagued with misogyny, sexual harassment at conferences, and people like you who want to ignore the whole issue in the name of not being told that they can't impose anything they want on a marginalized group.