There’s common sense on the part of the patron and the restaurant and onerous requirements imposed by a state government full of individuals that have never run a business in their lives. That’s the central point.
“onerous requirements”
Having food servers be made aware of the food allergy issues you know little about, is onerous? Education in an area that you don’t know about is bad?
If the patron says he can’t eat legumes, the food server should know what legumes are.