I think it is an interesting comparison. Why are more people okay with reading about graphic violence than they are about rape? To put it another way, why are some people more uncomfortable to see what happens to woman rather than to men?

I've known some people who react with more emotion when a pretty woman gets killed than a man. There is an entire trope called Beauty cannot be tarnished that exemplifies this exact thing. Treating woman, and what happens to woman, as some other than what happens to men. Many people have this idea that rape is the worst thing that can happen to a woman, and so it must be treated in a different way than everything else in a story. But that bites into the same sexism that we're trying to avoid. We don't demand authors show the effects of violence and be respectful to victims when we sit down and watch James Bond mow down hundreds of people who presumably had families.

The question needs to be asked; why is rape (in fiction) more upsetting to people than seeing fictional people get murdered? That, I think, is worth discussing, from like you said, a sociological, and so on, perspective.

But that's not how you meant it, is it?

I don't understand what you mean by this.