Incorrect. The way it works around Puget Sound is your property line includes the beach at low tide.
California may have a right to passage for the public on most beach areas, but honestly most of these areas are secluded, gated with guards and no public parking nearby. In order for someone to excersize their “rights” they’d have to go through a lot of trouble which brings their motivation into question.
Not true at all. The private stretches of Malibu are interspersed with public stretches. Broad Beach, one of the prime conflict areas (and where Redford lived--he sold it a while back), is immediately adjacent to Zuma Beach, a massive county park that runs a couple of miles.
Here's a picture of Broad Beach and Zuma Beach to Point Dume. The Broad Beach neighborhood, by the way, is not gated and guarded.
Or have a friend drop them off and pick them up (eliminating need to find parking).
Alternately, a boat service that dropped people off from the seaward side might also work.