The biggest thing that irritates me from this is the implication that anybody is arguing for "historical accuracy" to medieval Europe in a setting that has dragons and goblins that shoot lightning from their fingertips. If, for whatever weird reason, the DM doesn't want potatoes to exist that's okay, but you're not waiting for the Columbian exchange to bring them over from the Americas because the Americas don't exist here. If you have a player character that's a shape shifting sentient blob who casts illusions and is on a quest to seduce every milliner they can find then a plain tasting sausage made from fine ground questionable cuts of meat shouldn't be seen as a stretch.
Additionally, as someone who majored in History in college, I can assure you that most people insisting on "historical accuracy" on any one or two things they learned from a tweet or a tiktok about are almost definitely getting fifteen other things wrong in any given session.
I'm putting giant snails into my homebrew world now. It's a skypunk setting so I just have to decide if the snails are native to a specific cloud enshrouded plateau, a flying nuisance species of blimp-mollusks, or an invasive species that shows up everywhere. Maybe all of the above.
I believe it was Running who stated "If I have seen further, it is only because I have stood on the shoulders of giants." Referring, of course, to the works of noted giant Thrynn Walk.
One time another player and who both speak spanish were playing tieflings and decided that tieflings are native to mexico so we'd make jokes about our native foods that no one knows about bc they are "from mexico". Anytime we spoke infernal in game we'd just speak spanish irl bc the other players couldn't understand it. Super silly
Why wouldn't your setting have potatoes? Does your setting have Peru in it? No, no Peru? Gee, then it sure sounds to me like you get to decide where potatoes come from in your setting; they don't have to be a "new world" food if you world doesn't have or has a different "new world."
I still get teased about a player claiming bears can't go backwards and I just incorporated it into the battle. It was a one-shot for new players (and new GM). It was fun. Another player got pissed on to put out a fire. Fun times. "Anything goes" can be fun, don't overthink it sometimes
At one point when people on Twitter were arguing about the historical accuracy of LGBT+ groups in a DnD setting, I made the argument that anyone who includes potatoes in their setting doesn't care about historical accuracy anyway. This led to a discussion about what would be missing from a medieval setting and the conclusion that a "historically accurate" DnD setting would have gay people, but not potatoes. This became a running joke.
Fast forward a few months, and during a fair there's a vendor selling "sausages in a bun, topped with mustard sauce or sauerkraut." The players caught on to them being hotdogs, and it sparked another discussion about what foods were available in a "historically accurate" setting.
(Which, all those ingredients would have been available to the setting, even of they weren't eaten in that configuration.)
At one point when people on Twitter were arguing about the historical accuracy of LGBT+ groups in a DnD setting
Why wasn't your first response to gesture broadly towards ancient Greece? Homosexual relationships were fairly normal and marriage was mainly for having children.
In a strictly medieval Europe setting there's documented examples of homosexual relationships, but they weren't normal due to suppression by the catholic church