And by the way, I think you have a cartoonish view of Keynes. One reason why I lean more towards Keynesianism than other schools is because it acknowledges that there is no such thing as a perfectly rational Homo economicus. Coupled with information asymmetries in markets, this means that a pure market-lead economy will result in sub-optimal global outcomes.
Interesting, maybe you know more than I do, and I always thought I had read a lot of Austrian literature.
Could you maybe just point out real quick a paragraph that is representative of the Austrian School where it says that all humans are what you call "perfectly rational" (I'm not even sure what that is supposed to mean so maybe that's another thing that you could help me understand) ?