If the CI is in fact irreversible, then the fact that she didn't get one now opens up the possibility of changing her mind later. The technology will likely improve, like it has with all kinds of prostheses. As a hearing person, if I were going deaf and could get some kind of "bionic" ear I think I'd be inclined to do it. People who have never heard, who knows?

(I wonder how many deaf folks are on PT. More than I thought!)