I knew exactly what you meant, and feel the same way. However, you get two types of people who rehome, and some people who choose this are truly looking after the best interest of their dogs, and are extremely loving, and they're the ones who read these threads and feel bad, and they are the ones who should be congratulated, because this is not an easy choice.
The others don't give a darn anyway; their dog simply didn't live up to their expectations, and they think of the animal more like an inanimate object. I get frustrated when I read of someone rehoming because the dog is a pound bigger than expected, or potty training is taking longer than expected, but then I think, maybe the dog is better off in a different home. Why is it we never can offend the right people?