I’m very sorry to hear that, but I don’t think restaurants have to be forced to deal with that. The only thing I could support is “if revenue >X then allergen disclosure is mandatory”. I know personally multiple little shops that had to refuse customers, because that’s extra hassle and responsibility that they can’t afford to deal with.
In my experience in NYC kitchens, I wouldn't trust most restaurants to actually be able to accommodate certain allergies. If it isn't stated clearly on the menu, I would rather be turned away than to have an inexperienced kitchen try to manage something they haven't done before. My experience is different now that I live in the EU.
Do you also think businesses shouldn’t need to be “forced” to deal with accessibility? Web devs shouldn’t be forced to deal with accessibility either right?
They manage fine in Europe. It’s a cultural issue. If you can’t be arsed working through the minor administrative hassle once (how often do you change the menu..) to not kill your customers then you shouldn’t be in this business.