We have a labradoodle. He is a very sweet, gentle dog, though he is huge. He was being trained to be a service dog (he initially came from a respectable breeder) but he got too big. I guess they have to be under a certain length and height, etc, to be able to turn around in aisles, etc. So we adopted him. This trainer trains dogs to be service dogs, and they have lots of tests and evaluations they put the dog through before they accept them, but there are often times where, after the dog has begun to be trained, it just doesn't work out. Like, the dog remains skittish around the wheelchairs, or something like that. In our dog's case, he grew too big (and he is quite huge).
So, she has to find respectable homes to adopt the "drop-outs". We had to go and meet them, play with the dog, hang out, etc, and the trainer tries to fit the dog with the family (ie kids or no kids, etc).
So, because of my experience, the way I learned about labradoodles was through them being used as service dogs. I understand that now they are being marketed as a designer dog, and I see your point about people not responsibly breeding dogs, however, it was my understanding that the labrador and the standard poodle were first bred with the intention of creating a good service dog who sheds less than a lab. Labs make great service dogs, but they do shed so much, so someone with allergies might not be able to have one. Then poodles are smart, but I've heard they sometimes make bad service dogs, because they are a bit "too" smart. So, the labradoodle, I was told, was an attempt to make a good service dog for those with allergies. Have I been told incorrectly? I really would like to know, because this has been my assumption all along.
And, yes, my labradoodle does indeed shed, but not nearly as much as a lab. Much much less.