How Does Banning Food Prevent Food Allergy Attacks?

Recently, a small regional airline in Europe named Flybe decided to ban passengers from carrying their own food onto a flight. Instead, if you want to eat during your flight on Flybe, you would be forced to buy food from them.

Supposedly, this new policy arose from passengers with allergies complaining about the food other passengers brought on the flight.

Now, I don't know about you, but I really don't care what other people eat, as long as they don't make me eat things I'm allergic to. Also, I would worry more about unknown ingredients in food I buy than in food of my own I brought on a flight.

Am I missing something here? What do you think about this policy?

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