The bay is necessary to get your idea in the first place. It's not because the people who live in the bay are unusually creative, it's because there are unusually large numbers of creative people in the bay.
What a load of crap. There are unusually large numbers of creative people all over the world, if you know how to recognise them.
In fact, creativity more often occurs from a meeting of unrelated ideas - and you're more likely to get that talking to someone who isn't doing the exact same job within the exact same mind-space within the same giant echo-chamber.