I believe “One True Love” is a bit of a myth. Through most of human culture, marriages were arranged things. Even among the rich in all countries in the West, and in the US South, a form of arranged marriages has always gone on.
Accidental Love that leads to partnership is a nice modern myth. [14th century persian love poetry + 19th century romantics + 20th century movies]… but some form of arrangement, and financial and/or political motives is the norm among humans.
Gold-digging is a result of women not having the social structure to support the process, that’s all. That doesn’t make it a pleasant thing to face bluntly, but it’s normal.