IMO, in addition to, the shaky belief that rape games promote rape in real life to the audience, etc., maybe there is the belief attacking the creators like, "there is a person/group of people we know profit off the fictional depictions of rape/see concept of rape itself as good for cash flow. Because these people went through all the trouble and effort creating, publishing this work focused on rape in gratuitous detail - so its significantly more likely they hold beliefs outside the safe norms society upholds, than someone whose only conception of rape is 'its horrible' and doesn't need to think about implementation, writing graphic scenes, going out of their way to create and market 'a rape simulator', and so on. As punishment for perception of being immoral people their income source needs to be shut down."