You don't see why some women get annoyed at being lumped in with children as "those vulnerable people you have to protect"?
You have to protect both genders in video games. See, Watchdog Interferences quoted in Anita's video. Both Men and Women are victims.
Female victims just illicit a stronger response, and as such, are the victims used when true villainy needs to be depicted, instead of everyday thuggery. Men brutalizing men would be
too mundane and expected.
The smaller depiction of female roles in video games comes down to two simple things:
1.) The largest buying demographic is young males. Characters that are made to make the player feel involved, or made to be an extension of the player's anticipated will, will inevitably be male more often than female. Tldr, protagonists are generally going to be male because women don't buy enough games.
2.) Violence against women is publicly perceived as vile. This means women also can't be enemies, because doing so would deny the player the climactic resolution of defeating the enemy; to do so if the enemy was a woman would be vile and disrespectful to years of female-favoritism social engineering regarding conflict and violence, that starts the first time an eight year old boy is told by his mother that it's not okay to hit a woman,
as if it's okay to hit a man.
Considering that the combination of the two removes women from being the ideal protagonist or antagonist role, of course there's going to be a disproportionate number of female background characters. Or as Anita so tackily puts it, Females As Background Decoration.
As long as those two points are disproportionately true, women will not have equal depiction in video game media, simple as that. If you don't like it, go spend your purchasing power on games that promote strong female roles. See if you can outnumber the amount of young men interested in young-men-things, and enact some change in media.
(which is still one of the most ridiculously useless endeavors, but if you want to get up there on a soapbox with MAVAV under the idea that media shapes society and needs to be controlled/changed, knock yourself out)