Except...no. He wasn't charged with copyright infringement, he was charged with violating the CFAA and wire fraud. How is whether or not he would have subsequently infringed copyright by publishing the papers to the world relevant to whether he committed those crimes?

That's why this is a big deal. The DoJ came in and said "we think he's going to commit a copyright crime after downloading all these papers, look at his politics" but they couldn't prove that (or else why didn't they charge him with it?), so they poked around for something entirely different to charge him with even though their motivation in prosecuting him was to punish him for the thing they couldn't prove he was going to do. Raise your hand if you think that's how prosecution decisions are supposed to be made.