The typing advice seems out of place in the post, but I would encourage everyone to learn touch typing purely for the enjoyment of it. I find it really satisfying. I also think there are ergonomic benefits that outweigh any increased efficiency. Like the author concludes, though, nothing is "absolutely wrong" and to each their own :)
There is nothing wrong with pursing touch typing (or any other skill for that matter) for its own sake, and all else being equal typing fast is better than typing slow. My point is just that all else is not equal. The benefit of typing fast in terms of time savings is linear at best but there are ancillary effects to typing slow that can accrue non-linear benefits.
