That’s a good point. But people live there. Why do they shit their nest? And there are other higher end apartments that are well-kept and the parking lots and streets are not full of trash.
People in higher end apartments probably have ownership in something else: car, job, etc. By no means does apathy apply to everyone in poverty nor is it something that affluent communities are immune to, but I think the tipping point is passed in communities that are marked by high poverty. A bunch of them have given up and those that have not given up do not have the resources to overcome those that have. If 4 out of 10 people literally give zero craps about where they live and what it looks like, then the area is probably going to look like crap.