While it's true that summer rent is very expensive, people who work there can definitely pay it, but then you would not save THAT much, so people find their way into cheaper accommodations, whatever that means. So while I don't know the personal story of the interviewee, it's definitely not because a lack of jobs or low pay (a problem that DOES plague most of the country).
For hacker news, imagine if this article was about the "poor Google employee living in a van and cannot afford rent", you'd laugh at its face.