Have you read The Diving Bell and the Butterfly? It is the story of Jean Dominique Buaby who suffers a stroke. Tragically, he is left with a perfectly functioning mind, but his only form of communication is by blinking his left eye. Using this method, he narrates the entire, beautiful, novel.
The patience and dedication required to complete this book I previously would have found utterly unimaginable. The hell he must have gone through to write even the simplest sentence.
The agony to correct a mistake, I could barely bare to read on, as you feel every letter eeked out with such a force of spirit.
Then I bought a phone that pre dates predictive texting.
It's the same.