The closed, secretive, and controlling approach can work for some time. But it requires a lot of effort and the ability to react quickly to anything that might threaten that control. And the control has to go almost all the way to the top.
The internet has made it tougher to keep unwanted information from the rank-and-file. Even if they do not look for it, others can, and can confront them with it. The attention they are getting from courts and governments around the world for issues like CSA and shunning makes it harder to shield the rank-and-file from it. You don't have to seek out 'apostate sources' in order to learn about these cases; mainstream media is covering them, and you can read these reports from around the world from the comfort of your home PC.
Government pressure on the organization is nothing new. But now, it is much harder to control the narrative. What do you do when a congregation member gets the real story from a regular news site? Do you distrust the 'worldly media' when you are changing policies in response to their discoveries and claims? Do you demand that rank-and-file JWs only get their info from jw.org?