This is completely untrue. I volunteer for 2 breed rescues--I have for many years. One of the breeds is the Shiba Inu, which many people in this country are still unaware of. They are a very expensive dog to 'buy' from a breeder. We have so many pups come in each year, we end up turning many away because there are not enough foster homes for all of them. We take in many dogs that 'respectable' breeders with contracts refuse to take back. We take in mill dogs. We take in strays from kill shelters. We took in a whole litter of puppies that was dumped in a bag on the side of the road. Sadly, I have seen it all--and if you are willing to wait a bit, there are definitely puppies to be adopted.
OP, please consider adoption. Most adoption groups LOSE money on every animal, by the time vetting is done (as opposed to breeders making a profit on animals), but they make sure the animal comes to you healthy. Petfinder is a great way to find a specific breed. As a foster home, I have placed many dogs in homes with small children, without reservation. One of our own dogs was adopted when our son was an infant. True, some rescues do not want to adopt out to people with young kids. But many do. The benefit of adopting a dog in foster care is the foster home knows their temperament, often knows how they do with other animals, with kids, etc.
One thing to keep in mind is that rescues all operate on shoestring budgets with 100% unpaid volunteers. So if it takes a while to get a response to an application, or you don't hear back from someone, just keep trying. Most of these people are giving of their time but also have full time jobs, families, etc. Yes it can take a while to schedule home visits and get paperwork done--but anything worthwhile is worth waiting for. And it saves people from making impulsive decisions about a lifelong family member. I could tell you so many horrible, horrible stories about the things I have seen in rescue, the horrors that some dogs have had to endure. But I will just spare you the details and say please, please...DON'T SHOP, ADOPT!