I think the author completely misses the point here. Coding is learning how to write and read. It does not prevent one from learning other disciplines but rather helps make links between disciplines such as literature and mathematics. As for computer accessibility, with initiatives like the raspberry pi, decent computer power is more and more available.
Static types and unit tests don't solve or catch all problems. I'm thinking about event-driven messaging systems, which is pretty common in js; Static typing will not be of any help in that situation.