Kinda sounds like the same concept as how a lot of white people think Asians all look the same.
Though, I've never really.. seen it? I don't think all white people look the same, I don't think all Mexicans look the same, nor Asian, etc. Take a closer look at people and everyone, regardless of their hair / skin being the same, has different facial features, or hair styles, or expressions, etc.
Then again, I also watch way too many Asian dramas, and I'm around a lot of white people, black people, mexicans, etc on a normal basis.. so. .w. Maybe my opinion is different from most.