if I went to a restaurant and I asked for a plain burger and they still supplied condiments, it’s going back. That’s not what a plain burger is by definition, I’ve only ever gotten plain burgers without condiments though so I haven’t experienced this. I assume they did it that way as a “well if they wanted no condiments they would specify dry” but thats still an off case.

I don’t agree with normalizing to the niche/off cases (such as your cheeseburger example). Definitions in the field should be what people generally expect. In most of the english speaking world, a cheeseburger has cheese, and a black coffee means no milk/cream, usually no sugar, I could understand them adding sugar to it, although it would annoy me, but to add milk to a black coffee is not explainable.