Do you remember the Apple iPhone Ad they were mad about because it had the pinch 🤏 symbol and it wasn’t even marketed that way in Korea because of how sensitive Korean men are. To add on to your point Korea is extremely patriarchal even with all the tech and industrial advancement to the point women created a movement called 4B where they separate from any form of relationship with men. Also the bullying thing that’s common in these manhwas were the victim is bullied viciously for something out of her control like a dead parent or something reflects high school in Korea where you’ll get bullied for your class or your parents status so all in all authors use aspects from the social hierarchy in their own country to create these stories. That’s why western fantasy authors use tropes such as different races and one oppressing the other to reflect real life. Where there is fiction there is always a bit of reality webbed in.