- Mueller's is a criminal investigation. If he doesn't believe he can prove a criminal case, the public will never hear about it. Even if, for example, he had enough to prove that some specific Russian hacker changed the records of enough voting machines to change the outcome of the election: If that guy subsequently died, he wouldn't have a criminal case and the case would be dropped without further commentary.
- It's really not the government's job to decide what the public has an interest in knowing. The system is, for the most part, set up as "default public", and that's how it should be.
- The fact that information (may) come out eventually doesn't help if it requires action now. I believe it's quite obvious that the public debate about these hacks is happening now, and that this is information that is central to that debate. Let's say nothing happens to prevent future hacking, and we learn about this incident in three or five years: I have no trouble imagining FOX commentators dismissing it as "We had this fight in 2017, and now the democrats want to talk about it again?"
