Thing is, you obviously can become reasonably wealthy by following the first chart, if you're talented and 1 in 10 thousand lucky, whereas the second chart has a significant success rate.
The mega rich are too weak-willed to concede they've essentially hit a 1 in 60 million Powerball. Winning the lottery warrants glee, not pride.
Billionaires all exploit the working class—or at the very least they all inherently rely on its occurrence, without exception.
I'd add a third slice to the second pie: steal your way there.
You don't have to rely on luck if you can afford to buy a bunch of lawmakers and a Supreme Court or two. It's amazing how many "smart businessmen" rely on a bought and paid for justice system.
I think sports is where it’s most common. People who weren’t born rich but had the genes, drive, and luck to get into the sport in the first place can get pretty rich when they get to the highest level of competition.
The „merciless exploitation of the working class” is not how they get rich, but how they keep their wealth. If you're poor, you can't really exploit the working class. It's basically just birth lottery with a really really small section for the people with luck and/or hard work.