"It probably does not apply to you" and "Laws are usually applied as intended" and "You'll probably be ok" is what i keep hearing.
None of that addresses "if you get unlucky and some prosecutor decides to help his career by prosecuting you as an enabler-of-child-inappropriate-whatever-it-is". YOLOing away one's freedom on "probably" seems risky, and there is no reward to be had for doing it.
The only sane solution is to simply add "not for use in california" to all OSs, until California gets its collective head out of its collective rectum.
FWIW, only the attorney general can bring cases, not district attorneys or individuals.
Four of the biggest OSes (iOS, macOS, Android, and Chrome OS) are made in California by the companies who pushed this legislation through. Never going to happen.
"Designed by Apple in California, not for use in California" would be quite the statement.