It's important to realize, though, that Hacker News isn't just for articles about tech and startups. That's a common but wrong misconception. We want a wide range of intellectually interesting articles. That's been true for as long as HN has been HN.
Given Adventure Time's regular toying with ideas like SCIENCE vs. MAGIC, boundaries of morally responsible science, D&D meta-geekery (character alignments), machine sentience (BMO), and all of the games it plays in gender & identity roles and other existential weirdness, I always assumed it's adult audience would be strongly represented on HN.
Not only was the article the most in-depth analysis of the show I've ever come across, but the comments here contain intelligent discussion and observation that lead me to similar analyses and content like Adventure Time.
This was a perfect article for HN, as I use it; identify things tangentially interesting to the 'hacker' mind, in all it's different forms, and provide intellectual discussion on it.
Thanks to OP for finding it and you (dang) for allowing the discussion to remain. Glad to have seen it.
EDIT: for clarity
Ultimately, I have met a number of people who are so incredibly serious (and usually fairly young) that if it isnt a math paper, it's a waste of humanity. If only our brains worked like that!
Embrace neurally diverse experiences!