I flew aeroplanes, mil & civ, for forty years. No one I know has had problems with toxic cabin air (well apart from a chemical carboy in a freighter breaking). Ciggies, yes; killed one or two. One particular aircraft type seems to have a convincingly bad record.
My GUESS is that a very few people are genetically predisposed to hypersensitivity to any number of foods and environments. The World of the majority is not going to stop for the few - sorry.