The little guy in my avatar is a mutt, and a mutt from a true backyard breeder. We found him in a fenced back yard with the family's dogs, and he clearly thought he was a dog.
I guessed that he was a QH Arab cross, because in my part of the world, that's the most likely combo for an accidental breeding, and he definitely had traits of both.
I would buy 10 more just like him, as he truly was an amazing, fun little horse with the heart of a lion.
However, that doesn't make the process that begot him any more reponsible.
I've also had a half dozen or more grade school horses - tough, hardy, live on air, tolerant souls.
It's one thing to recognize a good individual regardless of breeding, it's completely another thing to breed without regard for outcome.