So by that logic you dont think anyone who will most likely never hold a title should fight? Or that any team that doesn't have a shot at winning the Superbowl, the World Series or the Stanley Cup should just forfeit the season?
This is their job...this is how they put food on their families table. I dont see anything wrong with fighting for as long as you can draw the interest of an audience.
And just how many fights do you think it takes for a fighter to realize he's finished? 2 losses, 3, 4? Is there a rule or some magic number?