Which is a style replicated, distinctly with the californian beach in mind, in other locales
Obviously not because californian beaches were the pinnacle of beaches, but because the media treated it as such, and entered a positive feedback loop to entrench its (current) position there
In the same way, the East Coast has beaches are associated with yuppies and yatchs, and the hawaiins with hawaiins and tourists
Its an image ingrained within the American conciousness; regardless of whatever "true" merit it might have, the descriptive language is universal (to all who consume american media, and media deriving from it).