#racial fetishization

I understand the concept of racial fetishism, but I fail to see why it’s problematic.

So a white guy likes asian women because they’re asian (and thus he associates them with stereotypes like submissiveness and softness etc) and he likes manga and schoolgirls and japanese culture etc. And he wants a gf who looks east asian… so what ?

It’s not that he doesn’t care about these women or doesn’t see their humanity, it’s just that he likes their appearance. And he’s not appropriating the culture or doing anything disrespectful, he just has a preference when it comes to his romantic partners.

Before multiculturalism was a thing, people could say “I prefer blonde girls, I prefer girls with big thighs, I don’t like skinny, I like brown-hair, I like a submissive girl, I like an assertive girl” but now that different people live together and cultures mix together, it’s somehow innapropriate to say “I prefer Japanese girls, or Latinas, or "I don’t wanna date within this particular ethicity”. Why ?