Why is the "Sitemap" of Funadvice unlike ANY other Sitemap I've ever seen? How can they submit it to Google as .xml?

Just curious. I have a didactic way of learning, which means I teach myself almost everything I can. (Even if I stay up 3 or 4 nights straight learning a topic; for example last week I was up for 72 hours and taught myself Cognitive Behavioral Therapy).

I also have an eidetic memory, which means I retain pretty much everything I read. Not quite photographic, but a glance will give me a page of text.

So (aside from the “debt crisis”), my long-term self-teaching has been about SEO / Internet Marketing / Google Services / On-site Coding, etc.

And I know I read that a Sitemap should show a logical depiction of the navigation of a website, in order for the Google “bot” to read it (in .xml format). And preferably, different formats for other search engines (although from what I gather, Yahoo! and Bing just copy PageRank from Google).

So, if Google is really the #1 head honcho, and Google’s “bot” determines a site’s PageRank (which determines their SERP, if I am recalling the acronym…search engine results position?) – WHY DOESN’T THIS SITE have a “sitemap” like every other site I’ve seen?

I click “Sitemap” on ANY other site, it shows navigational layout of the site. Here, “sitemap” is just a listing of questions (most which are nasty) in seemingly-random order.

So does FunAdvice not care about Google’s PageRank? I’d assume not, since Adsense is EVERYWHERE when logged out (I almost didn’t sign up, they bombarded my brain).

What is the deal with this sitemap?