Right, so your argument is what? That no valuable idea is ever written down? Or that no written down idea is valuable? Why would either of these be true?
I see a common fantasy among developers; they want to apply their sophisticated intellect and technical knowledge towards exploiting financial markets. So, my argument is that if this is what one is up to, one is not going to find many valuable ideas spelled out and spoon fed in a book.
But that's a non sequitur. There's no connection between the intent of the reader and the value of the content. Whether the reader is in the right mental state to learn from it is another matter entirely...
