Cultural norms is an interesting comparison. Despite there being no actual difference in capacity, cultural views forced many left-handed people to be right-handed, making those people miserable in the process for no good reason.
What you mean is that they don't have sexual attraction towards people of an opposite gender, where if they had a relationship with them, that relationship would encourage procreation.
To me that just doesn't seem like a "difference in capacity".
I personally don't want children, and will probably seek out a partner who likewise does not want children. If I encounter somebody who wants lots of children, I will see that we have different life goals, and I probably won't be very keen on being in a relationship with them. Do you consider me "damaged" or of "diminished capacity" because of it?
As a leftie, this is only true in the current world — I live in a culture with a left-to-right writing system, and yet technology means I don't ever need to use a fountain or quill pen.
I did have one teacher who insisted on "no biro" when I was a kid, but they were also my first introduction to "not everyone is actually nice".
The correct way to argue against this isn’t to say that “objectively” the world is the same for deaf and non-deaf people; it’s that there’s a culture and language bound up in deafness that don’t deserve to die thanks to medical advances. That is true, and makes treatments like these and what they mean to the deaf community much more complicated and difficult.
Or maybe not, if dolphins turn to be wiser than an average human.
Being deaf is objectively a disadvantage because 4 senses is objectively worse than 5 senses.
