The article didn't seem particularly negative to me at all. It said gore probably wouldn't run.
The guy is a political journalist, there's no reason not to cover the political aspects of the story, and Gore has yet to specifically say that he won't run for president, although he does make it clear he doesn't really want too.
"Is he or isn't he" is an important question, especially for Democrats thinking about what candidate they might want to support. Adam Nagourney has done a good job explaining why he probably won't -- and why such speculation bothers him.
What more do you want?