It's not a stupid question. The problem is twofold: Any place that's nearby is already too expensive to make the move worth it; and any place that's cheap enough to be worth it lacks either the coastal climate or proximity to civilization, or both. Or worse (or better, depending on your perspective), it's a place where the Coastal Commission won't let you build anyway.

So, in practice, you're asking "Why doesn't Google just pack up and move to Nevada or Kansas City?" Such a move would probably be highly disruptive to business (probably at least two months of lost productivity (even if you pay relocation consultants to handle everything) for all employees being moved, and you're talking about moving substantially all employees).