1. People on HN are already primed to appreciate this style of writing. Simple. Precise. Direct. It suits a technical literal mind to have less ambiguity and fewer flourishes.
2. On the web, where each individual piece of writing is not meant to last as long, the writing style has become more casual. Consider the difference between your average Medium article versus your average academic research paper.
Both of these points considered, I disagree entirely with the premise. There can be value to dense, even perhaps enigmatic writing. I would say that the greatest works of English literature tend towards that direction (James Joyce, Thomas Pynchon, David Foster Wallace).