As the saying goes, in a large forest, there's every kind of bird, and the same is true for noble families.
There are very few outstanding elites, along with a large number of relatives who are just scraping by—this has always been true of noble families throughout history.
However, unlike the common folk who may face the extinction of their family line due to the inability to find a spouse, noble families have sufficient resources to mass produce outstanding members. Accumulated over many years, they become as sturdy and unshakable as trees with deep roots.
The Yang Family is the most typical representation of this.
Even though the family's direct lineage was extinguished decades ago, various distant branches scattered abroad have gradually grown and strengthened over the years.
There are so many people with the surname Yang in the world, you cannot simply arrest and behead everyone with that surname every time one of them commits a crime.