Honestly I think that more than a few people who want dogs do not really have realistic expectations nor good conditions for keeping a dog. Just the other day a local rescue group posted about a pair 3 month old labs that had been turned into rescue. The reason ? They shed too much !
So many times people want dogs and are not realistic about how much time they actually need to be cared for properly. My neighbor got a dog for her kids for Christmas, and this dog spends most of his life in a crate in the house. He’s a big pit/ridgeback/lab mix and he should be getting lots of exercise. But, he’s not. And when they do let him out he’s so nuts in the house they put him back in the crate. I asked her why they didn’t just walk him more or play ball with him at the enclosed football field. She told me they don’t have time.
So I totally get why it’s the 5th degree when you want a dog that is in a rescue. They want to find a good fit all around. I think that a lot of the rescues do a good job matching dogs with families.
OP, I’m sorry that you didn’t get the puppy. Keep your eyes open and start working with another rescue. It sounds like you know what you’re in for and that you would be a good doggie momma.