Specifying characteristics of exemplary people, can serve as an encouraging example for others with those characteristics. Maybe another potential future female founder will read about her example, and decide to pursue the same path. Not everyone needs that, but sometimes it helps.
Which is a great thing, due to the massive lack of female founders in the tech world.
Males and females look at things differently, too, so there must be huge markets for female founders, who really understands women much better than males does.
This was a perfect example, too, as shopping is something the female population really... Excels at. :)
It's also pretty common in headlines for all sorts of demographic characteristics. For example, just taking a random example from the HN search: https://news.ycombinator.com/item?id=4830140 ("22-Year-Old Irish-Born Founder")
This is a really good point. In the context of the headline however, it's listed in a string of characteristics which would normally be considered obstacles which the founder overcame, and I do not see gender as an obstacle.
