Fun with peanuts continued:
https://www.secretflying.com/posts/traumatised-family-claim-turkish-airlines-removed-them-from-flight-because-daughter-has-nut-allergy/
I likely have better understanding of the peanut risk than most. I've grown up knowing (and traveling repeatedly with) multiple people with severe peanut allergies, I know some of them have mild reactions instantly if a package of a product with peanuts is opened in the room with them, I've been trained on use of Epi-pen and recognizing signs of reaction. And that's why I have my opinion that I expressed in my earlier comments:
The risks to a severely allergic person are not something that can be managed by not serving nuts. Pay attention to how many of your food items contain nut allergy warnings on the packaging. It is the majority of foods. The severity of some people's peanut allergies means them boarding a flight is putting responsibility for their lives into all the other passengers and crew's hands. That is forcing everyone else to shoulder a responsibility that is absolutely not part of their obligation as passengers.
Here is a summary of airline nut policies:
https://upgradedpoints.com/travel/flying-with-allergies/
At most, an airline will provide you a special seat cleaning. With severe allergies, there are guaranteed residues on other seats and other areas of the aircraft, not to mention on other passengers and in other foods. It is extremely unwise for someone with a severe peanut allergy to blindly travel without their own PPE. They know their risks and the ways to mitigate the risk (as I mentioned, travel a different way - I've known people who had to use medical charters so the plane was actually fully disinfected. Or, positive pressure filtered rebreather. Lighter allergy cases are ok with just a mask.) Not protecting themselves should not mean everyone else needs to protect them.