Dogs, in the US, are no longer an asset to use as a tool, such as herding, but merely a companion in the vast majority of cases. Agreed they became what they were in order to be useful enough to feed and care for, but different traits may be desired as a pure companion.
Reproduction and evolutionary success in breeding conditions are not the same thing as survival. No breeder kills off dogs with unwanted characteristics, they just don’t breed them.
I learned that when I met such a dog the first time some years ago and the owner told me about this. And I would not bet that it actually is "history" nowadays.
It is crucial to their survival. That's how they made it to this day in these numbers.