I think emotional support animals can serve a real, genuine, valuable purpose in some cases. This does not strike me as one of those cases.

There was a case recently on a United flight where an emotional support animal had its own emotional support animal. That's right: One animal was supporting a person, the other animal was supporting the first animal.

The animals involved were a dog and a monkey, but I don't know which one was supporting the other. United did let the whole menagerie fly.