Here's a good explanation of why perceived crime increased at the same time as total crime decreased in SF with COVID. TLDR: the number of crimes decreased, but the total number of people out-and-about decreased even more. The result is if you went out-and-about you were more likely to experience a crime.
Also, not every crime is reported. Not everything bad is a crime.
Swathes of homeless living in tents is not a crime. So is being screamed at by a drugged maniac. You also won‘t see people openly shooting up or defecating on the street in these stats.
https://sfstandard.com/perspectives/perspective-why-your-cha...