Author here.
In my defense, I don't control how things get posted on the internet. I woke up today to see this posted here.
> "Those who can... etc."
I spend over 50% of my time doing freelance work (writing code and deploying / infrastructure work). I'm not a teacher in the sense that I teach at school while not working in the field. I just happen to have video courses but I don't think I'll ever stop working in the field because I like it.
If you read the article you'll see I'm not a home row typist. I type at about 80 WPM with high accuracy so I'm sure you probably do type faster than me. Fortunately typing speed isn't that much of a bottleneck when it comes to delivering code on a schedule.
I posted the article on my site because I'm just a developer moving through life and I find certain things interesting. When I find products useful to me in my day to day, I sometimes write about them, but 95% of my site is focused on development topics not products. It just so happens recently replacing my keyboard lead me into thinking about keyboards so I thought it would be a good idea to write about it.
I wouldn't say I'm an expert but I do type a lot. Well over a million words (not counting code) just counting blog posts and course material over the last few years. Maybe the person who submit the article skimmed my site and saw some writing related posts (I have a post about Vim and writing 300,000+ words of course notes).