Except most of the scenes aren't written that way. Loss scenes I've personally written often include the loser clearly indicating their own desire and/or consent and therefore fall well outside the definition of the "not actually rape" rape scenes that we're talking about. Other scenes, like the male zil loss scene where the zil forces themselves on the player, mentions how the PC could make a good mother, and the PC silently expresses concern about how the zil might get them pregnant, with an implication that such a thing is not wanted, is more of what we're talking about.
I don't have an issue with rape being in a porn game, I more have an issue with people winning a gold medal or two in mental gymnastics to avoid having rape scenes count as rape scenes. But I don't see much appeal in either legitimate non-con or the safety-scissor "rape-but-not-rape" that we have so maybe I'm missing something.
Again, this is a topic that has been exhausted in several other threads. The answer to the question of "why is the rape in TiTS written this way?" is "subjectivity and the desires of FenCo," which is fine, but people are still free to point out the holes and take issue with the way rape is handled. Honestly, people that are fans of actual rape fantasies are also free to complain that the "rape" scenes in TiTS don't satisfy their kink. There's multiple sides to this, and it's not really a matter of "bwaah! I don't like rape!"
My biggest issue with it is that I really struggle to empathize with or "step into the shoes" of someone that's into dub/noncon but is also against dub/noncon to the point where they don't want to see scenes involving even remotely realistic representations of their fetish. It seems like a highly conflicted mindset and one that makes little to no sense, that's all.