It’s not rude, just ignorant.

Almost every action carries a personal risk calculation. Everyone’s threshold is different. Do you put a seatbelt on always? Drive a car in the pouring rain? Skip a flu shot? Go inside when lighting is in the area? All odds. Life experience makes out threshold different even though odds may the same. Flying with allergy is the same. Makes people feel better with the increased perceived odds to do something. The perceived decreases odds of reaction by wiping the seat is their choice. So is the known increased odds of flying southwest. I don’t and won’t with my daughter. Don’t judge.