A lot of elite athletes already select their partners from their peer group. NFL football has examples of second and third generation players trying to make it

A lot of elite athletes already select their partners from their peer group. NFL football has examples of second and third generation players trying to make it big in the league since the financial incentives are so huge. It's a lot like antique royalty marrying distant cousins in order to avoid marrying down into the "commoner" ranks. Controlling the bloodlines in order to have kids who can meet or exceed their parents' accomplishments.