I wonder what it is with hacker news and the inability of people on it to understand simple dramatic exaggeration.

A more realistic estimate would be something like 40%. When I choose to, I write C or Erlang, so there is generally not much boilerplate needed in making things go. I would say 60% of my work is architectural stuff. How things should be designed, named, structured. What parts should plug into what, what functions and set of systems of POSIX to use, what makes most sense for future reading, etc.