Ultimately, group homes are operating a business. The people running such homes are working there, not necessarily living there. That means the adults don't nee

Ultimately, group homes are operating a business. The people running such homes are working there, not necessarily living there. That means the adults don't need to form an emotional bond with the children, while the children do need to form emotional bonds with the adults for their development. That mismatch doesn't exist in foster homes, foster parents are much more likely to invest in foster children (both emotionally and financially) than group home caregivers are. To take a very blunt IT analogy, it's a cattle vs pets distinction.