[msb]

While I agree with your sentiment, I would argue that translating digital information for physical consumption (paper, e-ink, etc.) does lead to improved access for people with disability.

Digital textual encoding is only universally accessible if the context it is situated within is also textually encoded. The lack of context (i.e., poor accessibility compliance) across digital mediums is the single largest inhibitor for the visually impaired community. Once digital information is prepared for print, the source of output is simply a matter of changing peripherals (printer, braille embosser, braille display, text-to-speech).

The authors may not have intended to directly address the needs of disability, but I do not think that their use of "universality" is misplaced. We should applaud any effort that encourages society to think beyond the constraints of the graphical interface.