I'm using art in the general sense, to include all games as forms of artistic expression. I don't mean it as a value judgment beyond that.
Rape fantasies are pretty common, and it has nothing to do with condoning the act itself, which is indeed vile. I have not noticed any sort of desensitization to the real thing, myself; I seem to be able to distinguish fantasy from reality. In the same way that it's always been nonsense that violent video games lead to real-life violence, it's also not the case (in my experience, at least) that this sort of game desensitizes a person to real-life sexual abuse.
Different opinions are absolutely fine! You are entitled to yours. But I don't "need help" for disagreeing with them; that I am also free to do, just as the original opinion is indeed, as you said, free.
Thank you for your concern, but nothing is wrong with me. I'm not claiming any sort of personal issue with you; I don't see any reason to think anything is wrong with you. I would appreciate the same courtesy.