This is so overly simplified. There are many things in life that require you to make decisions with incomplete information. E.g., Business decisions and investment decisions. Not learning how to properly make decisions with incomplete information keeps you relegated to simply being an employee without the opportunity to vastly change one's own circumstances in life.

If you listen to a person describe the way to play as a Tight Aggressive poker player, you will see that the message parallels what Warren Buffett says about Value Investing.