When you challenge someone to a duel, you are not politely asking them for a duel, you are slapping them in the fucking face. Yes, hold on, let me just allow this jackass to slap me in the fucking face and bully me around.

When you reject a duel, you lose face. This is how dueling works. Dueling is not a matter of being "chuddy enough to duel", dueling is a matter of protecting your dignity.

Being willing to kill someone because they disrespected you, to save face, or protect your dignity seems very chuddy to me.