The question arises because I saw a video of Enid Blyton - at her peak, probably the most prolific fiction writer (up to 10,000 published words per day at her peak, apparently) - typing with two fingers (and with the typewriter in her lap).
This seems to be normal - I mean that most of the best writers who type, are not 'touch typists' - but instead type with two (or a few*) fingers while looking at the keyboard.
The only outstanding writer I know of who was a proper typist was Philip K Dick - who learned touch typing at school, and could work as a professional copy typist/ secretary. He was also a very fast fiction writer at his peak - and most of his best novels were done in his most rapid-publishing era of the early and middle 1960s.
Readers may be able to provide other counter-examples from among the very best writers since the invention of typewriters.
But what is surprising is how many writers, including most of the most productive, do not touch type.
I think the reason is that not many people can think faster than two-fingered typing speed - most are indeed much slower; and when one is composing then it does not matter if one looks at the fingers from time to time.
So typing speed is seldom a constraint on speed of writing.
*I am mostly a three-fingered typist - index and middle fingers of the right hand and index of the left. All of my family are, however, touch typists who do not need to look at the keyboard - and my daughter is very rapid indeed. They have often 'gone on' at me, saying I ought to learn to type properly because it would help with my writing. Yet I am the published writer and they are not; so I have carried on ignoring their advice... It is probably because I use that third finger, instead of sticking to two, that I am not a better writer.
