VCs have a hit rate of 1 or 2 percent in choosing successful startups. An employee, in contrast, has an even smaller chance to choose well, to get rich via an exit. It just doesn't make sense to join startups to get rich. You do it for the fun, the sense of adventure, the chance to make risky products, the responsibility, the level of engagement, and particularly meritocracy. Founders, on the other hand, have a better chance of gaining money and prestige, even from a minor exit.