Bill's intelligence, hard work, cunning, and competitiveness played a huge role in Microsoft's early success, and this success was multiplied manifold later on by extraordinary luck.
Once again I never said it wasn't necessary - the intelligence or the hard work. I merely indicated that it isn't sufficient for success above a certain level.
Your first statement is unverified, and probabilistically wrong. I heard a similar story that he dropped out because he couldn't take the advanced math classes, and that he was no longer the smartest person in the class. See everyone can do this!
Smartest at Harvard or Lakeview does not equal smartest at starting a company (also unverified - I'm sure there were people that were smarter/more hard working).
It's a sad realisation that in many areas in life (outside of pure competition such as sports), it's not about what people did, it's more about who they were, who they knew, and where they lived.
Liberating for some, but depressing nonetheless.