Just like if someone sits next to you on a plane with perfume that you are allergic to. Who moves? The person wearing the perfume has a right to wear it, but the person with the allergy should have a right to breathe. It's probably the person with the allergy or they suck it up. Ask me how I know
That's not the same at all. A service animal is considered medical equipment for someone with a disability. Essentially that would be the same as saying someone can't have a wheelchair. Medical equipment for someone who has to have it. Very different than just someone with strong perfume.
Person with disabilities may have a service animal for necessary tasks to live their day to day lives. I feel like the big confusion in this discussion really is a service animal versus emotional support animal. Service animal (that can go on cruises) is a medically necessary animal trained to preform tasks for their handler. I.e. a seeing eye dog.
I am not talking about Karen's ankle biter in her purse that she just refuses to leave at home.
If you're allergic to a dog and there is a service animal you can always request to be moved away from the animal but the cruiseline will not have the dog removed just because someone has an allergy. They are legally protected. The most common things they do is alert owners of emergency sounds for those who may be deaf, seizure alert, seeing-eye dogs, and also cardiac dogs. There are many other tasks they can do but that's the most common.
I have been on almost 10 cruises total, traveled multiple countries, multiple disney parks, etc and I can still probably count on 1 hand how many times I experienced service dogs in close proximity. Its not a super common thing. If you have an allergy and the dog is next to you simply ask to be moved due to your allergy. You may see them pass by on occasion but that's it. I only see them more often than that because I am involved heavily in dog training so I work with and around service animals in training often.
Also pro-tip for those people with too strong of perfume. You can always ask a flight attendant to move you if its bothering you that much. They can do their best to accommodate it.