Since when is this the definition of a breed? Scientists do not even agree on the definition of a species.
So do you think we should breed out the recessives that lead to Dudleys?
Or how about we breed out the recessive genes that lead to the dogs being too tall, or too short? How about those recessives that occasionally show up and produce white patches or brindles?
If you are going to throw out silvers, then you need to cull all the labs out there that don't meet the standard in other ways.
Mine has got a white on her foot. Uh oh.