Shore diving is fine if you gotta get wet.
I expect more from my diving. I want better viz, more life, less surge, no sand and all the stuff that basically sells against SoCal shore diving.
I love shore diving at night - no worries there. The expectations aren't as high, bug city, all business.
But shore diving in the day time, when I have the option to boat dive off a local island, or wreck, or artificial reef, or rig? Take a mellow boat ride, flop in - dive mouth agape at the majesty of the scenery, then climb back up a ladder of the weaiting boat to some warm snacks? Please. No contest. Given the choice, boat diving in SoCal kills shore diving. Anyone who says different is selling you something.
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Ken