It's the notion that we want to be compensated for risk in life. That's true of entrepreneurship, investing, lending out money etc. Shady industries tend to carry high risks, and therefore high risk-premiums to compensate. (e.g. see the price of illegal drugs vs the raw production costs in a legal environment)

But computers can neglect some of those risks. Not all, but some. And therefore needn't be compensated for them, and have a competitive advantage over humans.