The law has always made a distinction between an "idea" (a wizard school) and the "expression" of an idea (Hogwarts). You can't copyright an idea, just the expression of that idea. As an example: for all the ideas that D&D lifted from Tolkien, the only things they had to change were some of the names Tolkien invented himself (hobbits, ents, balrogs).
I don't see any hypocrisy here. Assuming Red Dawn did in fact just straight up clone Dark Sun, WotC was within their rights to shut them down. Conversely, even if Strixhaven is openly acknowledging that it was inspired by Hogwarts that's fine as long as all they actually copied was the idea of "wizard school."
I don't see any hypocrisy here. Assuming Red Dawn did in fact just straight up clone Dark Sun, WotC was within their rights to shut them down. Conversely, even if Strixhaven is openly acknowledging that it was inspired by Hogwarts that's fine as long as all they actually copied was the idea of "wizard school."