What you are describing would explain why some people might hook up. It is not, however, the basis of a coherent immigration policy.
To test this out, ask yourself: is the immigration/naturalization process of YOUR country based on which women men from the dominant ethno-racial group consider to be “cute”? I didn’t think so.
To be fair, authorities in the Tsai government are well aware of the limits of the old system (i.e. naturalization based on marriage to citizens alone) and some of them hope to change it. Will it happen?
Guy