I like purebreds for many reasons. The most being I know what I'm getting.
I have also lived with several crossbreds and a couple of real mutts.
If we don't give people and science time we would have given up on many problems within breeds and crosses of. Without purebreds everything would mold into one eventually and where would those that have specific requirements be.
The comparison I made between PB and Dals was a persons interest in the breed.