What sort of violent crime in SF do you suspect is going unreported? I get that there's some earnest frustration that reporting things like car break ins, shopl

What sort of violent crime in SF do you suspect is going unreported? I get that there's some earnest frustration that reporting things like car break ins, shoplifting, etc. is futile and wasting your time but is the any reason to think people aren't reporting being assaulted or face-to-face robberies?