Many ancient families have undergone genetic optimization; back in the day, to colonize the stars and adapt to the harsh environments of new planets, they had no choice but to optimize their genes. Humanity has gone through two waves of genetic optimization, each accompanied by great advances in our highly developed scientific and technological civilization.
"Your Highness, the Mecklenburg Family also underwent genetic optimization, aiming for perfect-level evolution, a secret known only to the Mecklenburgs, yet every citizen of the Empire knows how perfect the Royal Family's genes are."
"Hehe, I hadn't noticed; on the contrary, in Theresa's case, I just feel like the Mecklenburg's genes are pretty bad."