In my opinion, the rescues are good hearted people who want only the best for their animals. But they go too far - too demanding, too invasive, too threatening, etc.
They are looking for the perfect home, in their eyes. What animals truly want, and only want, is food, shelter,love. That's it.
Rescues have driven away good homes in their efforts to find perfection.
Meanwhile, child adoptions will take anything, including rushing singles and homos to the top of the list.