I rewatched the episode "Sons of Mogh" wherein Worf's brother Kurn is driven to ritual suicide by his disgrace amongst the Klingons following Worf's refusal to side with the Klingons in the guerre du jour.
He was stripped of his title and thrown out of the high council. He describes the humiliation as Gowron's men came and seized his land.
But it occurred to me that this was a great opportunity for Kurn to stand, fight and for him and his men to achieve a valiant Klingon death! So why didn't he and his men fight back against Gowron's men when they came? Presumably Gowron would have easily won and killed every one of him and his army, but they would have died as warriors!
EDIT: in light of the answers.
I'm thinking more in terms of he and his men defending his land and house from Gowron's men who came to take it, rather than directly challenging Gowron to a duel. So that he and his men would die properly in battle like Klingons, which we're always told, is the correct way to die.