[Someone]

It takes lots of effort to learn to read Braille at a later age, and you may have to do it at a very stressful time ("count on losing your mind for a year or two when you lose your eyesight", I've heard it described by a psychologist familiar with the matter)

Reading Braille also requires sensitive fingers. Cut your finger? Read a lot slower for a few weeks.

Nerve damage in your fingers? You may have to forget about reading Braille. And that's incredibly common among those losing their eyesight, as they predominantly are elderly and/or diabetic (neuropathy is a common side-effect of badly controlled blood sugar levels)

So, let's say you are sixty, diabetic, and losing your eye sight. Are you going to practice for a few hours a day without guarantee of decent results, or are you going to focus on all the other tasks to relearn, and try enjoying, say, the company of your grand children?

[dspillett]

Exactly.