Because the "I am a visionary that will change the world" is a game better played by people whose mortgage is paid off and who have enough savings to pay for th

Because the "I am a visionary that will change the world" is a game better played by people whose mortgage is paid off and who have enough savings to pay for their kids' college education. Also, having a successful exit (and success in this case is measured by the return to your investors, not whether the product survived the acquisition) does wonders for your startup career.