User blog comment:B214/Volume 23 discussion blog/@comment-31764731-20170420000500/@comment-23853100-20170420023307

Undergoing changes is not the same as having your traditions and culture be overwritten. People all seem to think that Pure-blood is solely mentality issue when it's not. There is also cultural and traditional issues in place.

If more Chinese from China enters your country eventually outnumbering your own countrymen, does it mean it's okay for your country's system, tradition, culture and law be changed to that of China's because there is more Chinese there than your own people?

If every Americans completely forgoes their culture and values to embrace the Chinese culture and values out of requirement, even bringing in more Chinese into America. Can that country still be considered as America? Can the people there actually still be considered as Americans, not Chinese in different skin color?

That's why you can't say the Underworld won't care about purity anymore because Reincarnated Devils are increasing in number. The Devil society will still value Pure-blood because that's their essence, their traditions. You won't see Rias claiming that Pure-blood isn't important to the Devils because it is important. If there in no longer any Pure-blood Devils, then it means it's the end of the Devils as a species. They won't be real Devils anymore, just a group of species with Devil powers.