I wonder whether all the animals of Eyeth are also deaf, and how they are doing?

Deaf predators must have a field day sneaking up on deaf prey.

As life evolved on Earth, so did the senses that life forms possess, and that happened for a reason. If you hare missing some senses, there is a sense in which you are set back millions of years of evolution.

It's not just about human society, but biology.

Someone with no sensory disabilities, sent into the wilderness, has better chances of survival than someone with such disabilities, other factors being equal. That has nothing to do with society, which is absent from that scene. Civilization is the best place for people with disabilities, even if it is geared toward those without. For that matter, it's better for animals with disabilities. People help disabled pets lead quality lives; wild animals with disabilities don't live long.

That's all factually correct. Though both things can be true: Disabilities can be a disability in themselves and additionally the disabled can also be disabled by the society around them. Someone fully blind might not be able to distinguish some poisonous mushroom from an edible one with the same shape and smell but different color. That is a fundamental limitation of the inability to see. But blind people can for example still read. They are often just not provided by others with writings that are accessible to them, although that would be possible and is not a fundamental limitation of their condition.

Also ableism and othering are very much a thing that disables peoples' ability to function in a society and come exclusively from the social environment rather than from the disabled themselves.

I’d like to add a quick sidenote .

I wouldn’t read too much into the logic of mythological worlds and realms.

Their purpose is narrative, not scientific. They don’t even need to be internally consistent.

No one expects Greek mythology to make scientific sense. Other mythologies should be seen from a similar perspective and understood that they are narrative, not logical.

Applying a scientific viewpoint to such mythologies results in a new narrative. The scientific view is always wrong unless scientific correctness is part of that world’s narrative.

I add this because a lot of people don’t know narrative purpose.

To put it briefly:

Other peoples worlds aren’t wrong when they don’t match “what makes sense in the real world”.

Thank you for writing this so I didn't have to.