Let's say you have a farm, and you raise some chickens.
You discover that one of the chickens is infected to the core with a disease. A theoretically curable disease if caught early. But this particular chicken is in late stage of the disease.
Do you still try to cure it, even though keeping it around poses a risk to you and the other chickens; or do you count your losses, kill it and burn the corpse?
@Jens_Rasmussen
Yup. But I'm using this as a bit of an allegory. I hope to make people understand that sometimes you can't fix a broken system, and you need to start from scratch.