From AlexanderD's comment:

"The point, though, is that the narrowness of focus in the adventure precluded exploration of a large set of options."

If playing D&D with a bunch of girls consistently leads to solutions being proposed that do not fit the traditional D&D mold, that can teach us something about how well that mold fits a bunch of girls. More generally, the author is a pretty smart woman who thought this was a good example - you'd do well to take a second look.