From a purist point of view the news should be factual and impartial. Editorials fail to impartial most of the time.
You have to choose what side of the fence you sit on, are you the BBC or are you Fox News? are you news or entertainment?
I support editorials because they are usually done by journalists who love there craft and do so on there own time, brings job satisfaction to staff.
It also helps pay for the craft to continue. I'm not so hot on celebrity bloggers though, thats just cheap money grabbing most of the time that can devalue the brand. Subject matter experts like sports stars I'll support, but bringing in some TV star to comment fashion is a joke.
But it works, and you have to take the bad with the good.
And most importantly because I think person X is a moronic jerk doesn't make me correct. It causes debate which is good, a long as debate isn't distraction. Which often happens.