There doesn't need to be a presumption of historical authenticity for the depiction to be offensive, a franchise presenting King Arthur as actually a woman and here "she" is sucking Japanese dick in a menage-a-trois because weebs want a waifu is bizzare enough as presented for outsiders who aren't deep enough in anime culture to handwave it. Clearly they are interested in the mythology and culture of it all, or they wouldn't be invoking it and writing around how these figures would interact within the plotlines (sometimes in historical regions), but fundamentally it's all warped around the desire to sell people something to beat off to which is the purest form of exploitative writing.I think my view is that Fate doesnt want to larp having any kind of authenticity to the mythological or histroical figures it genderbends and turns into otaku faggots or some shit
AssCreed played around with filling in the gaps in historical records by using its templar and assasin OCs , but otherwise did pretty basic attempts to depict certain events, locations or eras with some degree of historicity, you can get basic beats and even insights into random events from their depictions in the games, i dont think Fate's core series had that, while GO did have some events based on history
Lastly, i dont think Fate fans feel smug about knowing much of real events because Da Vinci is their favorite anime girl, while the whole AssCreed shadows discourse mainly got its flames of autism fanned by bizzare attempts to legitimize Yasuke because he pops up in a video game,
And focusing on the upcoming AssCreed being inauthentic is a weak argument, because Yasuke provably factually existed. He has no particular deeds or history of note beyond that, but that's the only veneer the franchise has ever needed, it's pretty much always been just an excuse for interesting settings and vistas. Unless you want to say the most notorious figures from the Golden Age of Piracy were all secretly involved in a world-spanning conspiracy regarding free will and so on. Taking such characters and spinning them out into Historical Fantasy isn't anything new for the franchise.
It's all about the motives of the writers and surrounding context that makes it all suspicious. It's possible to do these DEI projects with good writing and in a way that makes sense, but Ubisoft isn't going to get the benefit of the doubt with that context and people have such a hair-trigger for it now after years and years of hack writers shoving this shit down people's throats that it's really just out of touch of them to try and jump on the bandwagon this late. Peak Ubisoft basically.
Now stop making me defend a franchise I don't even like by waving an even more egregious example in front of me