Clausewitz, he pointed out that no matter how carefully one plans, on the battlefield, even the smallest of details can cause setbacks. Regardless of how well-thought it is, armchair strategizing only works in the realm of theory. Unexpected troubles, or uncontrollable factors such as weather. Operations face those sorts of troubles. They are the cause of strife on the battlefield.
Courage is a word of justice. It means the quality of mind that enables one to face apprehension with confidence and resolution. It is not right to use it as an excuse to kill someone.
A world where everyone is equal and receives the same treatment. No such place exists. If there was a world of equality, where talent and aptitude didn’t matter, we would all be equally snubbed there.