The one pup of my breeding that I placed went to a home that would not have taken a rescued dog. They didn't even want a dog, they already had 5. (the eldest 3 all being rescues, though one of those was adopted from across the country, so there was a very specific choice made there). My friend loves bull breeds, and particularly the Staffords, and particularly my bitch, Tess, the dam of the litter. Since she already had 5 dogs, and will probably always have a houseful of dogs, adopting a rescue pit bull was something she didn't want to do. Incorporating another adult dog could be challenging, and a pup, you don't know what the temperament is going to be. In bull breeds, it could easily turn out to be intolerant of other dogs. She didn't want to have dogs that didn't get along. I promised I would take the pup I gave her back if she grew up intolerant of other dogs in the household. A rescue really shouldn't make promises like that (if any ever do), but as a breeder, I felt comfortable saying that. (I probably wouldn't do that with just anyone, but this really was the best home on the planet, and I wanted my girl to have her chance at it)
I was personally really tempted by some rescue puppies a few months ago. A friend posted on FB a flyer for a litter of Plott puppies that were in a rescue. It's a breed I'm interested in owning some day, so I was highly tempted, though it would be a terrible time for me to get another dog. However, the flyer stated that the pups would be spayed/neutered before placement. Which is fine and good, but since I would want to do agility with my Plott puppy, I wouldn't want it altered at such a young age. I would want it altered, certainly, but not until it were a year or so.
And realistically, these people don't know me, if I contact them and ask to have a pup unaltered, with me already having an intact male dog in my house, are they going to say yes? I highly doubt it. So, sanity prevailed, and I did not ask for a puppy.
Anyway, I do agree with the idea that people should be able to have the dogs of their choice, be they from a breeder or from a rescue. I will always encourage people to get a rescue if that suits their needs, but it doesn't for everyone. And I don't think we have the right to dictate to people whether their reason for wanting a dog from a breeder is worthy or not.