@Bluehammer12 Most things like it aren't. But people who do like them will still look at you like you're the weird one if you don't happen to like them, because their popularity is just that widespread. Mayonnaise, ketchup, anything like that, really. If it's something that's really supposed to be "optional" there are people that consider it "mandatory" with particular foods. I'm pretty sure most authors from Japan have never tried to feed elves stuff like soy sauce and miso, so they're gonna go with what they know: average Japanese people.
That's basically the standard for things here. It's just that how the isekai tropes have developed really blows things way out of proportion, so it looks like some sort of weird culinary propaganda whenever somebody gets sent to another world in these stories. It'd probably be fine if they just had the characters do their thing and their friends are like "Oh, I like this" rather than "OHMAHGAWD, JIZZED IN MAH PANTS." Maybe a little less evangelizing about food stuff from the MCs, too.