To be clear, I do have concerns when I hear breeders selling poodle mixes. They are popular on puppy farms. They are often bred poorly and the breeding is less predictable. Also, many poodle breeders lie.
They make guarantees about shedding and temperament etc.
However, pretending thats exclusive to people who sell cross breeds is ridiculous. I work with the rescue that my poodle Cross comes from. She did need lots of work doing due to fear. Her first owners who coped for only 2 weeks did buy her from a puppy farm.
I also Foster and have and show and working cockers, springers and sprockers. Usually have some sort of behavioural problem and about 99% are based on the fact the breeder lied or misled the owner who was totally unprepared for what they were getting. The owners usually can't cope and are devastated. This goes for the crosses and pure bred. Yes the owner should have done more research. But the breeders are absolutely at fault as well.
When I was looking to buy my first dog when I was 20 and had my own home, I had a breeder try and tell me that Cavs and working spaniels were practically the same dog.
Pure bred breeders very very rarely breed 'for love' of the breed. All this 'they barely make any money' simply isn't true. Often they do breed to keep one. But often to keep that one for breeding. Because they need new dogs to breed from to keep their business going. If a breeder was breeding for love, they would be selling the dogs far cheaper than they do but ensuring the dogs go to the right home.
Its absolutely possible to find a good breeder of crosses. They can be hard to find, but it's possible.
Plenty of pure bred breeders, also pull the trick where they dont register all litters with the KC. They have non KC registered litters in-between the KC registered ones to get round the rules. Most breeders breed more than one or 2 litters in a dogs lifetime.
Plenty of pure bred breeders lie about parentage.
Everyone should absolutely be doing research on their breeder. However, it's incorrect to say pure breed = good and cross breed = bad. It also gives a false sense of security to those buying a pure breed.
Yes, I would have concerns with someone who breeds KC register dogs and breeding a breed that can't be registered. But I don't know the breeder and haven't done my research, so I absolutely would not rule out them being a good breeder based in some posts on MN.
I don't understand why people are opposed to poodle crosses based on assumptions. Sure many of them that people meet are bonkers. That's usually down to owners not meeting their needs. Like working spaniels who are out of control at home are that way because the owners aren't meeting their needs.