I thought California has always allowed jaywalking.
I remember my father telling my mother to be careful driving because people would walk right out in front of you from the sidewalk, and it was legal. That’s when we lived in Los Angeles, long ago.
I moved from Illinois to San Diego in the late 70s and was told that cars had to stop for pedestrians wherever they were crossing in the block. It was true - cars stopped. Maybe that changed as drivers become less attentive.