Yup...but a nut allergy is not a disability. It is a medical condition...and, the air in the aircraft is recirculated and the filters are only occasionally cleaned sooooo the allergen can be sitting in the filter from a previous flight or be carried from 10-20 rows back.

As was mentioned the AA (and Delta) policy is just a "We did something" event that was kinda mandated by the above reported complaint

A severe nut allergy is something that those affected deal with for their lives but, when placed in an enclosed situation with many potential triggers there is really not much in reality that can be done

Edit: It is also interesting that the complaint that was filed had to do with a MCO-NYC flight that was booked with FF miles....and they were upgraded to First Class for the return. This is where it all started because of the refusal to eliminate heated nuts in FC. If they had remained in coach they would have flown in ignorance with nut allergens flowing through the air