Lately I've been seeing a lot of "muh asian jeans" posts and I've been thinking what if its cultural?

Japanese, Chinese, Vietnamese and Koreans are conditioned from early adolescence that you must work until you succeed and sleeping may have to be sacrificed leading to many teenagers and adults sleeping 4 to 6 hours a night on average.

Is that how these guys can pump out so much work and improve so fast? They literally just don't sleep?

I was watching a video of a Chinese art instructor and he was saying how he recommends students sleep more on days where its very theory heavy to ensure they retain the info better and on less heavy days to get the work done to the highest quality possible even if that means multiple all nighters