Strangely, I'm not sure I agree - but it depends on the details of what being registered means. Of course close down the puppy farms and the poor breeders. Lock them up and throw away the key! Actually the Animal Welfare Act 2006 provides measures for prosecutions in these circumstances, but could be stronger.
What you don't hear about is the majority of small scale breeders with one or two dogs in their own homes who look after the mum and pups very well. Or what happens if your bitch is "accidentally" pregnant?
By the way we've been Kennel Club Assured Breeders for nearly 10 years - fully registered, inspected (twice), health monitored, litters tracked, purchasers contacted etc. !
Tony