Apart from the “why do you need it” question, the beach is specifically a place people often leave items that can’t be taken in the water unattended. Sure, legislators can write laws about how a gun must not be left unattended and gun nuts can swear up and down about how they would never do that, but they will. No matter how much you think “there’s a lot of people around” or “I’ll just be in and out” or “I’ll watch my stuff from the water”, thefts happen, and now a mundane occurrence has turned a supposedly (not really) “safe” and “legal” gun into one of those dangerous “illegal” guns they can’t be held responsible for.
We were perfectly happy with our gun laws, and they worked, and now fringe nutcases and a politically captured courts are telling us we can’t implement common sense restrictions because the nuts have a panic attack if they’re not constantly armed.