I'm not sure how tongue in cheek this was, but I assume it's serious. Either way, it's a fun and smart read. The article spots well the dark side of the moomins, but in my opinion goes too deep into it. My disagreements boil down to this: "One of the oddest aspects of the Moomin phenomenon is how these complex tales of apocalypse, breakdown and disfunction have been consistently misread as cutesy celebrations of dome…
The books are strange tales. They have dark undertones. And sometimes the adults take actions that only someone with life experience would really understand (e.g. Moominpappa wanting to suddenly upend everything in the families life and move to an isolated island). But, my kids mostly pick up on the adventure and the friendships.
I feel that the Moomins are like most media that is enjoyable by both children and parents in this way (e.g. Bluey, Pixar films, etc.).