The issue is with Step 1 - there is some reason why the world chooses to stop using computers despite (as far as I can see in the 'thought experiment') them being available and the homo sapiens needs/desires because of which we use(d) computers seemingly being the same. That reason isn't provided, isn't even implied or hinted to, however it's something major with far-reaching consequences to human behavior.

So it's kind of frustrating - in effect, the author describes a thought experiment of how society would change if X happened, but without saying anything at all about that X other than asserting that one of the things X causes is a mysterious lack of interest in using computers to fill needs/desires which (at least according to the original article) aren't filled by some better alternative.