Earlier quoted context omitted.
Probably because 12 year old boys like to play as somebody who looks like them just as much as 12 year old girls do. Games offering both options is exactly what the article was advocating.
Edit: see wongarsu's comment below, as what I say below is uninformed. The author was advocating for games in general offering characters of both sexes more often; I doubt she'd assert that every single game must have female options. Hunger Games an existing plot, and just as girls have been dealing with male-character-only games for decades, boys can deal with games that stick to the plot -- and I think 12-year-old…
[1] https://itunes.apple.com/us/app/the-hunger-games-panem-risin...