You can become violently allergic to practically ANYTHING. (The immune system, in each individual, creates a large number of clones of cells making different antibodies by pseudo-randomly editing the genome making the antibody, kills off the ones that recognize the infant body, and amplifies the clones recognizing new stuff that appeared at the same time the body experiences damage.)
A few bad reactions to a few particular foods got a lot of attention - and overreaction. Which ones got the attention was mostly a matter of chance. So now the clueless bureaucrats are taking extreme measures against the handful of allergens that got the press, and the rest are completely off their radar.
They have zero tolerance for peanuts.
- Do they have zero tolerance for shellfish? (Restaurants in Silicon Valley were very careful about allergies when I first moved here - because one had been informed that a customer had a shellfish allergy, fed her something containing shrimp, and she died.)
- Do they have zero tolerance for milk? (Some milk reactions are an enzyme deficiency, but some are an allergy, which can be deadly. Also: a protein in cow's milk increases the risk of Multiple Sclerosis).
- Do they have zero tolerance for tree nuts?
- Do they have zero tolerance for wheat?
- Do they have zero tolerance for honey?
- Do they have zero tolerance for corn? (It would be convenient for ME if they did - my corn allergy isn't QUITE to full-blown anaphylactic shock level, yet, but it IS to the "projectile vomiting" and "three days of flu-like symptoms" level. But I won't try to stop others from enjoying corn.)
- Do they have zero tolerance for eggs?
- Do they have zero tolerance for fish?
And that's just the COMMON food allergies.
If they had zero tolerance for every food allergen that had caused anaphyliaxis, they'd have zero tolerance for FOOD.