In regards to the OP's initial post..... it's very easy to explain, a rancher once told me this:
"Making money is really a very easy thing to do. It's keeping the money that's the hard part."
As I have found to be true here at ET over the year I have joined, there are many smart people out there. That's the problem, too many people think they're smarter than the market and in the end, well that's their undoing.
Your post hits at a critical point, KISS principle. Every successful person I have ever met has told me that they really don't think of themselves as any smarter than the next guy. In fact when people get REALLY SUCCESSFUL they usually give the credit to the smart people they have working for them. The really successful people that I have come into contact with always say they like to hire people smarter than them. Why not? Get your money's worth.
They all also say that the one biggest thing that set them apart from the herd is that they seized an opportunity and ran with it. It seems that once you have done this with some success, it just gets easier and easier to do.
Risk/Reward. Just about any intelligent person (notice I didn't say educated) can give you that little element of the key to success, but only a few actually ever embrace it and finally get to balls to run with it.
Opportunity is a very weary traveler. He knocks on many doors and finds very few people willing to let him in.
Good Luck!