Why professionals on Blind avoid daughters from wealthy families

The man is a "hexagon" (well-rounded/high-spec) and a lawyer.
I didn't include the previous part, but
He was dating the daughter of a multi-billionaire.
The daughter herself is an ordinary woman.
The man called off the wedding before it happened.
The reason was that the father-in-law kept acting condescendingly,
saying things like, "I'll see how you perform and then decide whether to pass down the inheritance."
They say daughters from wealthy families are the number one group professionals avoid these days.