There are certainly times when baseball is much more than bread and circus, times when baseball resonates deeply and meaningfully with many, many people, and times when a game that is built around overcoming failure can teach us all a few important lessons.
Nothing helps make a leader more approachable than admitting your struggles, screw-ups and behind-the-scenes thinking on hard calls. If the leader makes this a priority, the whole company will be more open and methodical learning from failure.
If you look at great human civilizations, from the Roman Empire to the Soviet Union, you will see that most do not fail simply due to external threats but because of internal weakness, corruption, or a failure to manifest the values and ideals they espouse.
You build on failure. You use it as a stepping stone. Close the door on the past. You don't try to forget the mistakes, but you don't dwell on it. You don't let it have any of your energy, or any of your time, or any of your space.
The more important argument against grade curves is that they create an atmosphere that's toxic by pitting students against one another. At best, it creates a hypercompetitive culture, and at worst, it sends students the message that the world is a zero-sum game: Your success means my failure.