Because a good breeder would be still in touch with the puppy owners...that's what they do, they should be the first person you contact about any sort of issue you're having with the dog, they should have explained that when they were signing the contract stating that the puppy would always be returned to the breeder before any other rehoming happened and they'd be in regular contact with the new owners about the puppy.
I've said before it's not a case of pedigree breeders being good and cross breeders being bad...it's that good breeders are hard to find and even harder when it comes to crosses.
That's because there is very little purpose to things like labradoodles...there's no showing, there are no sports they're better at, there's very little call for them as working dogs.
So really good breeders, the really invested ones that are already as rare as hen's teeth have little reason to be breeding crosses.
If I want to take up breeding good working or show labs...I'll get at most 3 litters from a bitch, you don't start until they're about 2 and a half both so they're physically mature and proven in their field. You leave 2 years between litters because you need them in good condition for either working or showing and you're wanting the best quality puppy.
You also need to find and pay for a high quality complimentary trained stud.
You keep a puppy because that was the point of breeding in the first place and the rest go for about £600 each.
With a labradoodle, must breeders own both parents - which almost never happens with pedigrees because the chances of owning a dog that happens to have the right traits for your bitch is so slim...if you do use a stud it's more likely to be a random dog close by because owners of the good expensive saught after stud dogs won't let you use them.
You only need them in ok condition rather than really good so you can breed them back to back and get a litter a year, you can breed them younger and older because they don't need to win anything and there are no KC rules about registering litters, either age or total amount of litters.
You've got an extra puppy to sell as you're not keeping one and they sell for more like £900.
So you're talking about more than twice as many puppies, without some of the costs and at a higher selling price...it pretty much attracts bad breeding.
You do get terrible pedigree breeders, but, amongst them are good ones, if you're just out to make money breeding crosses will make you more money and there is very little other reason to be breeding them so by default more bad breeders breed crosses.