It's the most important competition of the year, it's not that weird that one likes to see people rewarded that are amazing AND have worked very hard all year long. Behind the screens Yuna might have worked just as hard as the people who have competed this year - it just doesn't feel like that, because you haven't seen her and you feel less... involved. If Yuna had won it would've felt a bit like stealing the cherry from the cake. Maybe justified by an amazing performance- but still, I'd feel sorry for the others.
+ V/M is not entirely the same as Yuna: not being able to compete because of injury is something else as choosing not to compete (unless there was some injury that I haven't heard of).