1. Status Pursuit - Of course, all humans strive for status, but the pursuit of status in East Asian cultures is more extreme than in many other cultures I have encountered. The drive to achieve material wealth and high status in society is a driving force for many East Asians, putting high academic pressure on their children. Apparently, white people are considered the economically superior race in the US and the world (which is not entirely true), so East Asian women want to date the so-called "highest status men."
2. Accepting the system and not fighting it - East Asian culture is very pluralistic and individualism is highly despised. As a result, the common mentality in East Asian society is to accept the system and work within it rather than fighting it. Furthermore, the entire culture of face makes direct confrontation and disagreement seem extremely embarrassing. As a result, unlike other ethnic groups with a more system-fuck mentality, and therefore seeing marrying a white man as a sellout, East Asians are less hesitant to fight the system and prefer to work and adapt to the status quo, and therefore see marrying a white man as a successful way to advance within the established order rather than trying to fight it.
3. Colorism - Honestly, this isn't limited to East Asian cultures. You see it everywhere in the world, but the lighter your skin color, the higher the status you are perceived to be. I lived in China, and there was a cultural and historical belief that darker skin meant you were from a peasant background who worked in the sun during the day, and lighter skin meant you didn't have to do that.

Obviously all of this is generalization, but here are some observations I've noticed while living in East Asia. Those who say it's because white men are tall or want someone with a different family background are missing the fact that EA women are very less likely to date other men of color (e.g. black, Latino, South Asian). This is because those men are unfortunately seen as lower in the racial hierarchy than white men, and the majority cultural values ​​in EA are that women have no problem accepting the "racial order" and therefore prefer to accept and adapt to the status quo (as opposed to many other minority women who see dating white men as a betrayal of their racial identity).