They are the results of that same rationalistic "individualism" which wants to see in everything the product of conscious individual reason.

I lean libertarian, and have long worn the "yay Hayek!" mantle, but, looking back... It seems like he's unfairly using a) poorly-grounded attempts at large-scale social planning, to justify b) a philosophical, universal belief in the superiority of self-organizing systems over designed ones (i.e. even in building a robot).

Eliezer Yudkowsky has previous criticized b) in the context of Rodney Brooks's preferred robotic architecture. In some contexts, a centrally-planned mechanism which is the product of conscious individual reason is a better way to go. The inferiority of planned economies is not due to the very general superiority of self-organization that Hayek is claiming here.