No, it's because they were given a huge budget and told to spend it to hire and resource the best journalists. This started with the exodus of Arab journalists from the BBC world service, who downsized (Blair should have severely regretted this for what it unleashed in factual reporting on his fantasy dossiers) and continued with a deliberate attempt to hire the troublemakers from around the world - real journalists who cared about injustice rather than ratings.
The disregard for ratings is of course possible because they are funded by an oil rich dictator. He is not benign - no such dictator exist - but if the only good thing he ever did was create AlJazeera, then I would still be forever grateful.
Of course, in the true spirit of Make Something People Want, the disregard for simple ratings is what is causing AJ's growth in viewers around the world. A good chunk of people want real news, and these were the same people who propelled CNN to dominance, back when they had invested in news.