Yes, this is an excellent point which has application in many contexts. We simply don't know how rare the skills are, because the positions are so rare. There m

Yes, this is an excellent point which has application in many contexts. We simply don't know how rare the skills are, because the positions are so rare. There might be 100 million people who could do the job at Walmart, but there are not 100 million Walmarts. There aren't even 100 million paths to get to the CEO position, and while there is certainly some economic Darwinism at play in determining who gets on those paths, I suspect that it's overwhelmed by noise as people carom around the socio-economic network like the balls in a lottery machine.