There is also the way that, in a capitalist system, every message eventually gets swallowed up and transformed into a way to sell products. It's just the nature of the beast. The hippies started out preaching the importance of love over material wealth, and their message ended up getting twisted into a sales pitch for Coca-Cola (https://www.youtube.com/watch?v=1VM2eLhvsSM).

So in the end, it doesn't really matter much what Marie Kondo's message is; once it became popular the system was inevitably going to fold, spindle and mutilate it until it could be used to sell products, because that's what the system does. It deflects critique by absorbing and redirecting it, and it is really damn good at doing so.