I can by no means claim to be as knowledgeable on any of this stuff as the post's author is, but my take on this has always been that rationalism is a philosoph

I can by no means claim to be as knowledgeable on any of this stuff as the post's author is, but my take on this has always been that rationalism is a philosophical view, and thus, it's really not clear why you'd think it should lead to great material success given that philosophers in the modern world tend not to achieve said great success. I am personally enthralled by philosophy and I'd also consider myself a rationalist (and have spent a decent amount of time reading SSC), but I'm unable to draw any sort of putative causal connection between that and being very successful. Indeed, delving into this stuff is what I do to screw around, so pretty much exactly the opposite.