Very valuable point!

In addition to the limits of human planning and intellect, I'd also add incentives:

as cynical as it sounds, you won't get rewarded for building a more safe, robust and reliable machine or system, until it is agreed upon that the risks or problems you address actually occur, and that the costs for prevention actually pays off.

For example, there would be no insurances without laws and governments, because no person or company ever would pay into a promise that has never been held.