Putting up a smokescreen is not difficult for a club the size of Juve. Sport journalists are not that smart to begin with.
And those sport journos DO have to report something (pressure from SKY and papers), so they do 2+2 and simply report on what - according to them - is the most likely scenario. And they are right because this works 50% of the time. It's how they operate. So they are able to guess normal every day calciomercato.
Guardiola is different. It's not an every day situation. Agnelli is probably personally making this deal, along with even higher people in the food chain (Exor, Elkann, financial guys). These people are so much smarter than your GDM and the likes, it's not even worth comparing. They don't go to Palazzo Parigi and let GDM's sources hear or see anything. They operate on a level of secrecy unknown to sport journalists. Which is why Guardiola sources are only coming from people with contacts in the financial world.
For example, yesterday GDM was in Madrid running around in the heat to put a mic near Conte, fuking lmao. You think he knows what Agnelli, Exor, Elkann etc are doing?
He can guess the random Matuidi, Cancelo, Dybala, Pogba transfers because Juve don't give a fuk then. But now, if Agnelli is personally making a deal, GDM and the likes are gonna know NOTHING.