Why do so many Asian girls dye their hair brown?

I'm not hating but It honestly looks so unnatural because some of them have jet black hair so their roots are jet black and their hair is an auburn or brown color. I mean if you want to dye it dye it a dark brown or something? I see so many Asian girls with this hair color. Why do they like it so much? It looks really unnattural.
Why do so many Asian girls dye their hair brown?
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