I agree that we always need geniuses, and I never meant to imply that we can dispense with them. The question is how we use them.

To use the military analogy, you can either put your genius in a uniform and hope that he leads the troops to a victory mostly through fortunate circumstance (because there is a limit to the effect of a single genius on the battlefield no matter how good he is). Or you can instead use the genius to design a system that allows all ordinary foot soldiers to perform 100% better.

I prefer the latter approach because it distributes the effect of the genius more effectively. Also you lose fewer geniuses that way.