Your postscript raises an interesting point. I strongly suspect that readers here can have a much greater impact on their real world success by improving arational traits like charisma and physical appearance than by continuing to strive for marginal gains in what are likely to be already-high levels of rationality. At the very least, it seems uncontroversial to say that these traits play a huge role in one's real world success. If we assume, then, that "real world success" is a rational objective, why isn't everyone here hitting the gym daily, working to improve their fashion sense, and enrolling in acting classes to improve social finesse?