City might not make daily official pronouncements on transfer activity, or other aspects of the business but that doesnt mean they dont care what's written about the club.
It just wouldnt be in the club's interests to allow speculation about interest in players such as De Bruyne or Pogba to build up if they were without foundation. Why build up the fans expectations that we're about to make a major signing if its completely unsubstantiated?
I think City have a a fairly pragmatic approach to the media. They know that there's an awful lot of misinformation in the media and that its pointless issuing daily bulletins to try to correct that. But they wouldnt allow a major story to be constantly reported in the media if it were completely untrue.