The Kennel club is guilty of being passive, they could/should have taken stronger action to prevent these things happening. They made an attempt at encouraging healthy breeding with their assured breeder scheme which is very detailed and includes the inbreeding coefficient to ensure breeders are not intensively inbreeding to cement certain traits but they then decided to charge big bucks to belong to this scheme which causes you a lot of work and so everyone left it- why pay to belong to something that is hard work and costs you money? So I agree the kennel club hasn’t done enough but it’s the breeders who warp the dogs gene pool and it’s the breeders who become the judges (you have to be a respected breeder to become a judge) and they are so deep in it they also look for the current fashions rather than dog health.
The kennel club does intervene sometimes and it does this by not allowing dogs through to the final ring that have been bred or interfered with in a way that’s detrimental to their health. If you mess with the dogs conformation and move away from the prescribed breed standard you simply won’t make the final cut. Dog showing is ridiculously competitive and a lot of the people who do it can’t see what they’re doing is wrong. When breeders went too far giving German Shepherds sloping backs and ruining their hips in the process not a single German Shepherd made it through to the final, same with pinned ears or overly brachycephalic heads- you’re out. So the breeders then change what they’re doing because they really want a win. There are good breeders out there, ones that pick healthy breeds and make the effort to get a good match but you get tarred with the same brush as the bad dog breeders, treated as if you’re an awful person so mainly they just give up which is a shame because if we go down the morally superior path of all getting our dogs from a dog homes there will be no distinct breeds left.