I don't understand it. Like was said, treating an eye infection is waaaay less expensive than removing, not one, but BOTH eyes. I've treated, goats, horses, cats, and rabbits for different types of eye infections. So bad, some not so bad. Even when we needed to treat for a week or more the cost never went above $300. No matter how bad it was! Removing both eyes would end up $2000+(Between the cost of removing/anesthesia, as well as the care and visits before and after). So that to me just doesn't make any sense.
What I think COULD have happened, and this is just speculation. The dog had a bad eye infection. The vet said "Okay, we can try to treat this but the dog is painful and I just don't think she will get vison back or the infection will go down. I think removing the eyes would be the best choice for her(him?, I forgot)". Owner just couldn't be there enough or went to college, moved, family passed away, had kids, dog wasn't comfortable around kids, etc(Still, stupid of an owner to do it, but I can sorta understand why). The owner told that to the shelter and shelters tend to come up with sad stories that gets dogs adopted. Now, I absolutely love most shelters and what they do. They just want to help them. But they also need to make space for all the new ones and some people don't adopt them until there is some sad story behind the animal. Most the time the stories are just speculation(like I am doing here). I fostered an APT puppy last year, for a few weeks. He was young(as in less than 15 weeks) and very unsocialized. Terrified of people, and yeah, I thought maybe he was abused. Just because that's what everyone else was thinking and saying(he was found on the side of the road) but I really think he was just scared of people. Didn't matter who, he would take forever to warm up and was nervous around sounds and people moving in quickly. He was like a feral cat.
Another thought is, perhaps the dog was born like that, or a previous owner removed the eyes for, again, bad infection or injury. Something happened to them, or the dog got out(could explain the "untreated injuries") New owner found her or purchased her then dog had maybe some underlying issues like resource guarding, SA, DA, Barked a lot. And they turned her in and just made up the story on the spot about what happened to the eyes.
If it is a totally true story, yeah, it is disgusting and the owner is a huge idiot. Poor dog deserves a good home.