Well, it at least touches on the valid point that the actual cover is the one that would sell way more copies, which is why it exists, b/c it is a magazine whose sole function is to make profit, mostly for the 23 year old woman who created the magazine to market to 9-14 year old girls.
Appealing to fears and insecurities is what these magazines, b/c that sells, and if you frame ever problem as something to be solved by more consumption then it's a double bonus. That's why Men's Health and Maxim cover are quite similar.
While peddling such crap to vulnerable young girls is crass and ugly, it is about profit motive and it's inherent conflict with ethics and decency, not about any kind of gender bias.
Note that this 3 year old story and cover redo was a reaction to a viral FB post where that "Girl's Life" cover was contrasted with a "Boy's Life" cover which focused upon on paths to various careers. The invalid comparison ignored the critical fact that Boy's Life is a 108 year old publication created and published by the non-profit Boy Scouts of America whose target audience is Boy Scouts. They had 2 versions of each pub for different age groups, with that particular one being targeted to 11-18 year olds (IOW, includes young men graduating H.S.). In contrast, Girl's Life is an entirely for-profit magazine created by a 23 year old woman who got very rich off it, by designing it to do nothing but profit by appealing to the concerns of all pre-teen and young teen girls within a culture that seeks to make all solutions to all problems about more consumerism.
IOW, the difference in the nature of the covers is not about gender bias, but about being a non-profit vs. for profit where they do whatever sells the most copies, plus the younger age skew of Girl's Life.
How do you know that the first cover would sell more copies?
Precisely b/c the second cover had to be invented as a protest, b/c there were no mags for teen girls that looked like that.
There are countless people whose sole job it is to sell anything they can to teens. They spend millions on market research to explore what will sell, and that research has lead to the creation of numerous mags just like Girl's Life (Teen Vogue, J-14, M Life, Popstar, American Cheerleader, Seventeen) and none like the second cover.
If you seriously think such a mag would sell, then you could be a millionaire in months, b/c you'd be the only game in town to satisfy that market. You see the same pattern in every other form of media as well, from the most popular songs and TV shows aimed at that demographic.
Not to mention, any time spent around 12-14 year old girls would tell you that the first one would sell way more. Do you seriously think there are more 14 year old girls who sit around and talk more about about taking AP classes and their future careers than about boys and hair?
I was a nerd who hung around nerds, and that wasn't true even in that crowd. And my more recent misfortune of occassionally overhearing conversations between that age group suggests that little has changed. Boys are just as "shallow" (for lack of a better word), just with different interests than boyfriends and hair. But, as studies have shown, boys rarely read at all outside of school work (and not much then), so there aren't magazines at all that target teen boys.
Also, don't forget the content isn't just trying to sell the magazine itself, but to sell other products as well. Ads for the latest fashions are more successful if accompanied by lead stories of how the most important thing when entering a new school year is having the latest fashions.