Well the difference there is that people wanting to become actors or artists know it is a long shot, and that most likely they will end up waiting tables or ten

Well the difference there is that people wanting to become actors or artists know it is a long shot, and that most likely they will end up waiting tables or tending bar in hopes of a big break that never comes. At least in times of bubbles, SV isn't like that - people found companies and hire people who do quite well until the bubble bursts.