Onagar, no that's not what Jooly and I have been saying. We're saying that you'll be rigourously interviewed, expected to sign a contract to return the dog if ever you can't keep him and so on if you go to a reputable, decent breeder and if you really have the dog's welfare and best interests at heart as well as your own.
A good rescue will go further still. Any decent rescue will generally ask you to complete a written questionnaire, then follow up with a phone or email conversation. They'll invite you to meet the dogs - or perhaps a select few suitable dogs, will require to meet ALL the household and any other pets, will then homecheck you, which is where they will want to know if you are allowed to keep dogs in the property. Thereafter you might be okayed to have the dog, you might be asked to sort something out first - increase the height of the fence or wait until the big family dinner party has come and gone and it's quieter in the house - or you might be asked to return to rescue to build up a bond with the dog, perhaps several times, before taking him home.
The dogs in the average rescue are, roughly speaking, made up of the following - a very small percentage of dogs who were adopted from the rescue and have been returned because the owners can't keep them, a large number of dogs which are abandoned/neglected/lost and unclaimed and, increasingly a very large number of dogs who have been purchased without thought, commitment, knowledge, or any promise by the breeders to take the dog back when the owner has kids/changes work hours/moves house/divorces/realises that their baby has grown into a toddler and now "can't cope" with both a dog and a child/realises that they have a working or herding breed which is running rings around them and that they've no idea how to train a dog and can't be arsed to try...
You know I often say that there are a huge number of dogs in rescue who come from family homes, that they're not all strays?
Well, there's your reason.