Would you like to define 'requiring' FD?
So anxious headmistress, West coast USA and the little darling gets an epipen. Third world upbringing and no money and no epipen. Now both end up asking for a class 1. The severity of the allergy has nothing to do with the carrying of an epipen. Even the frequency of use of any epipen is not really an indicator of the severity. And the number of instances of symptoms merely reflects the ability to avoid exposure.
This all seems a lottery.