Sexual violence versus not-sexual violence has been an elephant in the room for a long time, and the elephant is getting ever bigger with the rise of feminist voices to criticise the medium. Violence has long been a deeply interwoven part of video games, from Mortal Kombat and Carmageddon and the like all the way through to the modern plethora of shooters and fighters and beat-em-ups and everything else. It's not just accepted, it's become weird to not accept it. You're meant to accept Call of Duty and Grand Theft Auto, just as you're meant to accept Tarantino movies and Game of Thrones and gangsta rap. It's isn't a weird hobby, it's mainstream culture.
I feel like the elephant in the room isn't necessarily sexual violence, but most forms of sexual content. If I recall correctly the australian ratings board have refused to rate other games because of content related to drugs and violence as well, but I do think there is a general taboo regarding sexual content. You can't show nudity on television in a lot of countries during certain hours, but things like alcohol, violence and murder is perfectly fine. I mean just look at the amendment in the UK banning pornographic productions that includes things that depicts aspects of female pleasure. All that comes from a puritanical world view that's not only ignoring any sort of rational morality, but also targets females because they aren't allowed to express themselves sexually the same way as men are. In the case of pornography there is absolutely trouble with how women in that particular industry is treated. However I'm completely convinced that the irrational taboo regarding sex and nudity is hurting more than it is helping in that situation. I might have spun of on a tangent here, but I agree with most of the other points you made in your post.