Except he gets his facts completely wrong. For example, Columbus' Voyage was privately financed, and the risk of such voyages was generally privately insured.
You might want to check your facts. It was financed out of the royal treasury and commissioned by the Queen.
The asteroid belt alone is so full of easily reachable resources that there is almost no risk and spectacular gains being made. That's why the private sector is gearing up for private (robotic) space exploration and mining.
"Almost no risk"? Are you kidding me? Anyone who thinks asteroid mining is a viable business within the lifetime of anyone reading this is delusional and/or hasn't thought the economics through. Professionally I am an engineer and I'm also a certified cost accountant. What that means is that I evaluate business costs and risks for a living. Anyone who says there is no risk in asteroid mining has no idea what they are talking about. It might be feasible a long time from now but there will have to be a huge amount of government financed research before it is ever possible that private enterprise will go there.
The financial risk alone is enormous and there is no guarantee of success and basically none of the necessary technology currently exists. A mission like this is hugely expensive (many many $billions if not $trillions) and and good luck getting insurance since the risks are unknown and unquantifiable currently. We do not have ANY equipment capable of mining an asteroid nor any near term reasonable prospect of seeing any - particularly from the private sector. (When Caterpillar starts working on it then you should sit up and take notice) We don't have any equipment capable of refining such minerals in space either so that will have to be developed (along with an adequate and robust power supply) or you'll have to return raw ore to Earth.
As for the "spectacular gains", that requires returning the (hypothetically) mined minerals to Earth which is the only place they currently are useful. Even if you somehow manage to return a huge amount of a valuable mineral to Earth you'll disrupt the market value of that mineral most likely causing prices to drop while your costs (many many $billions) will remain fixed and large. While that doesn't preclude it being a profitable enterprise, it does make evaluating the return complicated. And I'm a certified cost accountant so I know first hand how hard calculating the ROI would be. (borderline impossible FYI)
Worst of all any mined materials have to be returned to Earth in large (heavy) quantities. If you drop a large amount of minerals onto the surface of the Earth from space, congratulations! You have just created a Weapon of Mass Destruction. If you can return an asteroid from orbit you can just as easily drop it (on purpose or on accident) on someone to catastrophic effect. Even the remote risk of someone accidentally doing this means the risk of this technology is enormous.