Do you not think there is something interesting about a cartoon that appeals to children by employing imaginative characters and silly humor while simultaneously appealing to adults with existential concerns? For it to skim along the somber surface of the topic of mortality yet somehow remain lighthearted (though not frivolous) is a remarkable balancing act.

You're certainly entitled to your opinion, and I've no dog in this fight...but it's a lot more than just an entertaining piece of media; seeing it on HN does not surprise me.