In some breeds, yes its very important to me, like the ACD for example, Izze's parents were health and genetically tested and OFA rated, but were never shown, they were working farm dogs, owner was a rancher who had like ... 100 + acres and raised beef cattle. He only had two dogs and Izze's litter was their one and only breeding that I know of, and he only bred so he could have another working dog.
Josefina, though I love her, shouldnt have been bred, she is a cool dog but is a total wash out as a working dog, put her in front of stock and she folds like a cheap lawn chair. :/
For my other new breed love, MAS, I prefer sport titles to a bunch of conformation titles. I mean its great that a breeders dogs are pretty, good examples of their breed and structurely sound, but if they cant DO anything with all that soundness and beauty, other than prance around a ring, then IMO all that is null and void.
Lincoln's breeder does show conformation, but she also puts sport titles on her dogs, and leans heavier toward sport and working, and that is what I look for in a breeder.