While the Levi-Strauss explanation is attractive, there are other factors as well. The author seem to think that a kludge of things such as email, ms word, and screenshots is an inferior workflow, but it has virtues as well. Those tools are stable and reliable and have been around for 20 years, and can be expected to be around for 20 more. Nothing about them is going to fundamentally change, and the user can expect that everything about them is controllable by the user, and they they'll appear on any new platform that might emerge (smart phone, tablet) essentially unchanged.
Contrast this with something that the author sees as a better solution, say, Instapaper. It began as a paid app, then it was free but with a Pro version, then it was subscription-based... the whole situation just seems volatile - it could disappear tomorrow, and it stores the data god-only-knows-where. If you happened to go with Readability or Evernote Clearly then now you're back to square one and have to figure this stupid crap out all over again.
There are a lots of users who value stability and reliability over small efficiency gains, and who don't enjoy spending time navigating ever-changing marketplaces.