I don't consider two short paragraphs a "wall of text" so no worries there. Sadly that can't be said for the actual content. Where to start.
"Now to address the fetish outlook to it. People get off to practically anything in this word. BDSM exist because someone wants to be a slave to someone else. Silly to rag on writers for it."
You are aware that this isn't actually a defence for it's inclusion? In fact that point you were responding to was that writers don't include it for ersatz historical accuracy, they include it for fetishistic titillation. "It makes people horny so its ok" is simply restating the point I was making, and no, its fine to "rag on" writers for any content they include.
" If slavery is a concept in the world a writer makes then I have no issue with seeing it. I am not the type of person to complain something that is negative is in a story. If we follow those rules then any story on war should pretty much never be written."
Good for you. I too don't mind seeing "something that is negative" included in a narrative, assuming it serves some larger narrative purpose. So you can take your little straw man about "following those rules" and jog on.
" I have read some stories where the MC didn't want to purchase a slave but saw the alternative that would happen to them if they didn't buy said person."
You are aware that "It makes my life better" is hardly a morally defensible argument for opting into a system of slavery? Actually I honestly don't think you are.
" It's a system that is there that you can't change as a singular individual."
Similarly, "I can't completely abolish slavery so I guess I'll opt into it" is equally morally indefensible. It's also often complete bollocks given how OP most Isekai characters are and how they could easily create significant social change.
"The slavery ones just stick out the most in your head so you remember them a lot more because you dislike the subject."
I don't have a problem with fictional depictions of slavery. I'm perfectly capable of making the distinction between fiction and reality. The difference is that I don't feel it should get a pass when handled poorly. To be clear, I find the common usage of slavery in Japanese Isekai LN's for fetishistic pandering to be creepy. I find ostensibly normal members of modern society unthinkingly opting into systems of slavery to be creepy (and it breaks my suspension of disbelief but thats secondary). I find slavery is seldom if ever explored or used with anything even approach nuance in these stories. My distaste is not for the subject at hand it is for the manner in which it is employed.
"It just bugs me when I see someone generalize an entire demographic like that. Makes you look petty."
No, this makes me look petty. What "demographic" did I generalise? Did you perhaps mean medium? Because "Japanese LN's" is not a demographic. Though I will agree I should have been more specific and said "Japanese Isekai LN's" (Which would also not be a demographic, it would be a genre, though an almost pointlessly broad category of one). I suppose it bugs me when people make elementary mistakes while trying to talk down to others?
