It continues because breeders have convinced themselves that they aren't doing anything wrong:. "It's always been done that way". What started out as a quest for desirable characteristics; every breed was bred, sometimes with a bit of inbreeding to a bloodline, for a purpose,from cuddly lapdog, to protective Dobermann,to swimming Newfoundland to all the rest; and most of them were first bred in the last 250 years, many more recently; has degenerated to breeding for a look and, worse, for whatever look wins prizes in the show ring. The fashionable shape for several breeds has changed in my lifetime, according to the prevailing whim of the current judges (all breeders themselves and all with an interest in promoting whatever their own dogs' bloodline is currently producing).You want a GSD or bulldog which looks like the original ? Or a golden retriever that's not best described as a white retriever ? Keep hoping !
It's not as simple a battle as stopping docking of tails for all manner of breeds, including such as poodles, and, goodness, that was hard enough.