I don't think it has to do with church indiscretions Jako. I think our generation just has a totally different bullshit meter. The more we learn about science the less we need religion to explain the universe to us. I am technically a Catholic (by choice). But then I came to my senses this past year that it is all bullshit and nothing more than HUMANS trying to make sense of why we are here and have consciousness. I also refuse to listen to a bunch of stories from people that roamed the earth 2000 years ago to tell me how to live a good moral life in the present day.
In my opinion, the guy that wrote the letter very well may have meant that if this stuff gets out it could be a shit storm in the press. That is a take it at face value statement. He wasn't saying, "DON'T tell people about this, he was just saying, it will get ugly if we do." Those individual priests and bishops chose to cover things up. That is on them. The guidance did not implicity say, DON'T, though. It may be plausible deniability, but he still didn't give them an order.