And never the twain shall meet
"Why?" you might ask would we do something that sounds so wrong?
I believe that, although it started as a way to create differences between basically alike breeds, we do it this way now out of tradition, and because the "desired type" has been codified into standards and therefor is harder to change because people often feel that if they improve something they are admitting that they weren't 100% correct before.
When people become an authority, it can be hard for them to back down from their mistakes. And if you have been making the same mistake for 40 years of breeding, it becomes very hard to admit that you have been doing it wrong, (darling).