Good point, but not exactly saying the correlation doesn't exist -- I'm sure there are a lot more dropout Joe's out there than billionaire dropouts. It's the mindset that is bothersome, if that makes sense. Earning a graduate degree doesn't mean you will be making groundbreaking inventions, just as dropping out doesn't mean you will become the next Bill Gates -- so I feel like the degree thing is just a moot point that should just be ignored.

It really depends on the type of learner you are. I guess different minds just work in different ways, but it is still interesting to observe how a lot of highly influential figures tend to be drop outs. Just my two cents.