No, I didn't. This is another way to look at the Austrian Economic theory of the business cycle. Most of the time Keynes is given no credit, however he wasn't just some hack.
The Austrian School says the root cause is excess credit expansion, at least according to Wikipedia. According to you, excess credit expansion is not required, the only requirement is humans being humans (that is, stupid). That is in sharp contradiction with the Austrian School which believes the business cycle is preventable with good monetary policy.