I just hate glorification. For example viewfinder (the older, popular manga; where there is even an anime). He is raped very violently, often and then falls in love with his rapist. That is disgusting. In the omega verse it has a reason and in this manga the omega is suffering through it. So at least it's a realistic touch.
I personally love viewfinder, though I can understand that people will question your morals and common sense if you make or like something that contains something like rape, some might hate you for doing that but we can’t ban them from making or liking something like that, we simply just have to stay away from the things we don’t like
exactly. Though I feel like it's also an outlet ya know. Like some people have a fantasy or an urge? I guess for something like this but don't want to harm anyone in the process, in comes Fiction! and hentai and dolls like I think it helps actually some people to satisfy the desire and result not doing it in reality. Idk that's one of the ways I view it. Another reason is just that the story needs it to make it more intense or dramatic.
I always see people get mad at rape on yaoi mangas and seems to be okay with rape on hentai such as emergence and even called it a masterpiece