I'll echo Dickies' post and think you're missing the point.
A lot of these breed specific rescues are not your run of the mill shelters where you're blindly adopting a dog. Many are foster based, where they're rescuing very specific dogs that fit their profiles. The dogs are thoroughly evaluated before being taken to a foster home. From there, the fosters keep them for varying amounts of time depending on the dog's situation. Once the foster feels the dog is ready, they put them up for adoption. People can apply for adoption and go through a thorough process to vet the family, their home, etc. Once you're ready to adopt a specific dog, they send you a full profile on the dog to see if they meet your expectations. If they do, you formally apply and then the rescue + foster parents determine if you're the best match for the dog and vice versa.
We started the process with a Lab rescue in Aug and finally found a match last month. It was frustrating (we were previously 0 for 5), but the end result was a picture perfect match. When we applied for a dog, we got an 8 page profile describing every little detail about the dog based on the Foster's experiences with them. With the dog we ended up adopting, that profile was so spot on we knew him before we ever met him in person.
I hope it doesn't fall on deaf ears; these rescues are doing amazing work.