Although I understand that the lizards are fond of slavery? And the Red Prince mentioned that if he were anything but a Prince, then he would have been killed at birth.
They may not be as civilized as their wardrobe and cities imply.
(Also true of many humans.)
In the early kickstarter snippet about them as a race, I recall it mentioning that they actively partake in selective breeding to cultivate physical traits that they consider ideal. That seems to fit very well with what the Red Prince implies.