JURY TRIAL: Does every California personal injury case go to a California jury trial?

No.

The vast majority of them settle prior to a California jury trial.  You have to remember that most injury cases that attorneys retain usually have good liability, and if a car accident, more than likely high property damage or evidence that shows "causation of injury."  This means there was either plenty of bio-mechanical force to cause injury and the property damage repair (or photos) support this contention.  Since most cases are good cases, then it is those cases that usually settle just short of trial, or well before a California law suit is even necessary.