When you can type quickly, there’s a joy to the iterative quality of writing. You start bashing out a sentence, then realize about half-way through that it’s not quite what you want — the phrasing or ideas are “off”, clichéd, flat, barbaric. So you instantly delete all but the first few words and rewrite, zipping back and forth and trying out various microexperiments in phrasing and conception. This is delightful and fun, and pretty much impossible if you can’t type fluidly.
Proponents of handwriting tend to romanticize the physicality of the pencil and paper, while failing to appreciate the rich physical and kinesthetic joys of the keyboard.
Good to see this argument for both/and rather than either/or.