This conflates material reality and ideology, though. Not to say a cultural or social reality isn't real in its own way, just that it is preceded by objective, material reality. I think the arguments tend to boil down to people prioritising one or the other and then refusing to budge.
I'm pretty laid back about it but draw the line at people attempting to assert there is no such thing as material conditions. I'm not explicitly "Marxist" but definitely Marxian in the sense that I think all theories need to be anchored in material reality in the first instance. So gender categories exist, but are part of the superstructure.
Have you tried Outlier Dictionary? It integrates with the Kanji Study app, if you aren't already using both there's really nothing better in my opinion. I did exactly what you did, but ultimately realised I'd prefer to study Mandarin directly.
I'm not sure about the ownership of foundations, charitable funds and the like; some degree of corruption wouldn't surprise me unfortunately.
I will say that she won't have been deliberately pushing class-stratification given her socioeconomic background, however the whole setting is heavily influenced by Victorian-era children's novels about boarding school adventures which were absolutely saturated with classism.
They surely needed a team of editors towards the end.
deep microwave lore here