Why is the right of some people on airplanes more important than

Avalon - Why is the right of some people on airplanes more important than the right of others? I have asthma, so being in close proximity with some animals is a real concern for me, yet I have to be subjected to this allergen because the pet owner wants to take their pet on the plane free, so they will call their animal a service animal to get around the rules. What about the right of those with allergies?