Are you going to lend him $500,000 to start this business? After all, banks and investors want to make sure they invest in the right people. Wouldn't want to throw your money away at a "risky investment".
Also where are their initial customers going to come from? If you don't attend the right schools or network with the right people from early on in life, why would people go out of their way to attach themselves socially to someone who is unproven?
Yes, just start a business...if only it were that easy!