I think we all live in our own bubbles, because I see so much discussion of SF crime.
I also think it's important to note that there is a huge difference between "should we prevent random street killings?" and "how much effort should SFPD exert to protect cars when the majority of actual SF residents don't even own one?"
EDIT: Just to cite my sources: [0] shows 397k registered cars in SF [1] shows 810k residents.
[0] https://www.dmv.ca.gov/portal/dmv-research-reports/research-...
[1] https://www.census.gov/quickfacts/fact/table/sanfranciscocit...