The lack of specification is likely intentional there - apparently they're not trying to distinguish between people who can or can't follow a spec; but rather t

The lack of specification is likely intentional there - apparently they're not trying to distinguish between people who can or can't follow a spec; but rather they observe that for some people the obvious or default or simply easiest way to get a bunch of text in HTML would be to write it in Word and press 'export', and for other people the obvious or default or simply easiest way for them to do the same would be to write HTML directly. It seems plausible that those are two quite distinct groups of people, and apparently they prefer one over the other.