The PDF is a transcript of a video that is linked from 15th paragraph of the article, but is just one of many linked videos. The actual article is a response from the author (approximately) of the recent HN post about the 100 square foot house.

The article itself is good, and you might enjoy it. I skipped the video, which is probably flawed in the ways you suggest. But maybe you could unflag the interesting link to the response in the meantime? :)