Because one conversation centered around romantic prospects between women at any point in any piece of fiction is an absolute travesty.

/sarcasm

As a schizoid, I don't really care for the romantic discussion either. That said I still appreciate it because it shows the characters at least trying to have a life outside of their jobs. This is literally the first time we've ever seen any of the characters in question discuss romance. There are also plenty of other conversations between women and women alone that have nothing to do with men, such as a conversation between Merlwyb, Kan-E-Senna, and Nanamo sometime during 2.x (2.4, if I remember right) about politics. I don't see the need for getting so worked up over this short story.