Dogs that are carefully selected from reputable breeders for the purpose of competition and don't turn out to fulfill that promise, aren't the ones that wind up dumped in shelters and breed rescues. The overwhelming majority of rescue dogs come from careless pet owners who fail to spay and neuter their pets and BYB.

By the time it becomes apparent that a potential competition dog doesn't have what it takes; the owner has far too much emotional investment in that dog to just take it and dump it for someone else to worry about. The rehoming process is never taken lightly, is always handled personally and the prime concern is the welfare of the dog.

The ones to be upset with are the ones who purchase on impulse and dump on impulse.