You're probably going to get perceived as a race whiner here even though you raise a good point.

My reasoning here is, white American men in general are very protective of their women and hate the idea of "outsiders" dating their girls. With the high obesity rates in the country, a slim and attractive white woman has a higher value in the USA than she would have elsewhere so there is the sense of urgency among white guys in the USA. White American guys are by nature very competitive, generally dislike minorities a lot, and will do all that is possible to keep that hot blonde they fapped to growing up from making out with an Asian or Brown man.

Now a white girl being raised in the USA has been told her whole life to hate minorities, not associate with them, and do all that is possible to keep from dating one or she will face consequences. So while your typical attractive white girl in the USA would love to sleep with a Godfrey Gao or Siddarth Malhorta lookalike, the issue here is that she has to worry about aggressive attacks from the white guys in the country who will do everything they can to stop her. Slut shaming, attacking her reputation, and spreading rumors about her to stop her from getting with that high value guy of a minority group.

The fact of the matter is, good looking white American women rarely go interracial because white American men are generally more hateful, racist, and will do everything they can to stop her from doing so. Once she does go interracial, a lot will resort to attacking her status and making her life miserable for being with the same minority they hated their whole lives.

White guys from other places are used to there being so many fit and good looking white women in their countries that they do not feel this sense of urgency so they don't care if some tall, handsome, and higher value Asian guy gets with a woman of their nationality. A lot of them will let the woman choose whoever she wants to sleep with and fuck rather than indoctrinating her into hating other races.