I think everyone has a certain kind of formula in their life. When you deviate from that formula, you're going to fail big or you're gonna win big.
The men in Vietnam weren't allowed to fight the war with any kind of concern to win by the government. It was like a war of attrition.
The champion's management says let's do this for real, for charity. Rocky says no but decides to be true to himself even though he's going to be berated by everyone. Just to compete, not to win.