Again you are assuming that I or anyone else must agree with you upon what makes a gentleman. Dueling has not always been a gentleman\'s fight. For some it was the only way to settle a dispute. The gods work their will through the combatants, the fates would spin their threads, and the two individuals at dispute would fight to the death. The only attrition granted to the loser was death, while the survivor was honored for being just, true, right, or however would best describe the victor in the dispute. There was never made mention of the individual\'s character, personality, flaws, or any other such trait except in the ballads recited afterwords.
Beyond this you have those battles that were waged as a test. Duelling to determine who was the best leader, who was the strongest warrior, who alone could walk with his head held high because he stood alone upon the field of battle while his opponents were carried away in carts. There would be honor on both sides. To die in battle alongside your kinsmen is the greatest honor, the greatest demonstration of nobility, one can have. Likewise, to defeat those who come against you and be the sole bearer of victory for your People and Creed is the greatest honor you can pay to your Ancestors and Descendants.
But what does character have to do with this? Nothing. Even the peasantry die for their causes. Even the lowliest of thralls can die in a fight for freedom, justice, truth and/or honor. Duelling is not solely for the gentleman.
Great ballads and sagas are not told of those who fought no battles, whether it was a battle of mind, wits or upon the fields of honor. These legends and tales are left to those who are beyond the confines of the average individual in some way.
And frankly, you have not reserved your statements to the limits of what you think is a duel, but instead attempted to define such according to what you think is right and just. Tradition and law are upheld by the lawful. To take a neutral stance on such things is to be aware that your thoughts or opinions should never be used to influence others.