I've kind of addressed this in the past, but I want to go over it again as the topic came up in comments. Someone was horrified that someone else was "breeding rescues." The logic seemed to be that once a mare is found at a low-end auction, despite her breeding, conformation, show record, production record or any other factor, she is automatically a rescue who should never reproduce because her offspring might end up in a similarly Bad Place.
If you have an "exiled prince/princess" story, feel free to share! One of my all time favorites is the story of Champion Lodge, who is a gelding, but would have otherwise been another good example of a breeding quality horse who wound up in the wrong place. (Minor gloat on this - early on in this thread on COTH, after his pic/video was posted but they had not ID'd him, I posted that I thought he was a really high quality horse. That's what I mean when I talk about having the eye. You can learn to have it, too!)