I have lost my 20/20 vision over the years due to age. It wasn't a blessing to lose my 20/20 vision. It isn't something that I want to celebrate or expect people to say "yeah, it's awesome". It is just one of the side affects of aging. Now I wear glasses, basically need an assistant device (glasses) to read this post. If I could have it fixed via surgery or other means, and I knew that repair would work, I would. I would much prefer to not have to spend money on glasses or wear them.
My Dad has lost much of his hearing. He needs hearing aids to hear. It is age related. He is isolated by not hearing. It is not a positive thing. He got hearing aids, a few different ones over time, but really, they are a pain. If he could get his hearing back, he would. It would make all of our lives better, but most importantly his. It would reduce his health risks.
He also has lost vision due to macular degeneration. It is a classic age related illness. His loss of vision is not something that he would keep. He doesn't think poorly of those who have never had vision. He knows for him, it would be better with vision returned. If he could have a medicine that would fix it, he would. He had medicine (needles in eye) which saved much of his one eye's vision. It was new medicine at the time, and his other eye was already damaged.
So, for both my Dad and myself, it is about what we wish we could still do. It is about adapting, put up with intrusions such as assistant devices. Dad definitely does not want to die yet, and has adjusted to his losses. That does not mean he wouldn't repair the damage if he could.