[inanutshellus]

It's a game that allies play in order to prepare for enemies.

When played with allies, it connects you to each other and lets you put your guard down (which is perverse to those that don't get it).

The same game played with an enemy teaches you to deflect rather than internalize bad-faith insults and teaches you to use wit and words to stand up for yourself, keeping your dignity without violence.

...

Also it's a demonstration of equality.

e.g. you can't play the game with your boss or your son, but you can play it with your brother and your peers.