This is what I'm talking about: this is a thread about a violent crime, and you're talking about quality of life. This has nothing to do with the tragedy at hand, and conflating the two only serves to demonize society's most needy.
If you find that SF's quality of life doesn't suit you, then don't live there. I don't.
We know. There has been a mass exodus from the area for various reasons - among which is the crime and cleanliness issue. How many HNer's have moved away and are never coming back?
SF is facing a looming income issue since so many high earners have left the area. This will contribute to it's decline even further.
Safety and cleanliness are not what I would dismiss as quality of life issues. Those are basic needs.
If you find that SF's quality of life doesn't suit you, then don't live there. I don't.