That's the bottom line and 100% legit statement! However, you will have to situate this topic within a given context. As there is no meaning without looking at context.

Let me see if I can elaborate. Singapore, as a country, has 1 million expat population and majority of the expats are Caucasians. Singapore also has over 1-2 million domestic workers from the neighboring countries, with many women working as live-in house help. Adding to this context is the fact that prostitution is legal in Singapore so asian women "hooking" up with Caucasian men is not uncommon. Much of the stereotypes you refer to have their source in this setting. In such a setting, regardless of socioeconomic status, I can see why seeing an interracial couple can be frowned upon. Because everyone is asking the question of whether the match is a matter of a hook up or a true connecting between two individuals.

Now if you look at a country like the United States, it is not uncommon for Asian women to couple with a White man. There is an implicit understanding that you will date within your own socioeconomic status or "hidden" class. Unless the conservative views of the Asian families hinder such a matchup, it is not frowned upon to choose partners outside of their race.

Regardless, I go back to the quote I highlighted that there should be no judgement!