A startup has a life but the people who breathe life into it…, well, they usually don't.
People like the idea of a startup. It is romantic. The excitement diminishes when they find out the extent of their responsibility and compensation. Basically, most people really want to work for Google. Google is a multibillion-dollar behemoth that has all the risk management tools and processes to support it. And yes! They still have all the perks and cool parties at the end of Google I/O.