I reply your question here. It's cultural thing.
In general in Asia, people are reluctant to grow old (or grow up

). We embrace the youth periode and want to keep being young regardless some genetic advantage. Aside from language influence, that's why women use high pitch voice. Teenagers and young adult dress like they're under 12. Young adult enjoy to live with their parents until they get married or even after, regardless if they have enough money (or not) to have their own place. Because live is easier when daily chores are done for them, either by the parents or the maid. The downside, their live decission is influence by parents/family, perhaps for their whole life.
Japanese/Korean/Chinese manga (comic) and anime (animation), boyband/girlband, and drama in demand. That's why there's contact lens with overly big pupils. There was a periode when women draw their eyebrow so thick, we call it Crayon Shin-can eyebrow). They are effort to be seen as "still young". Being young is seen as being cute. Of course it's not always true

.
In the other hand, in Europe or US or Australia, children can't wait to grow up. It's a dream being adult and get freedom that you don't have when you are a minor. They embrace independecy. Parents encourage children to gradually do stuff themselves.
Teenagers put too much make up, dressing like an adult women. Young adult can't wait to have their own place. There are part time jobs available so they can at least have a bit of money. Their own money, their own decission to use it. This jobs are scarce or not existed in some Asian countries. Being an adult means you can decide.