Sometimes, it is important to conceal how intelligence is gathered. That's obvious when it comes to the name of a spy in a foreign country, less obvious but no less real when it comes things like cyber-interference. It would still be telling foreign countries what the US is looking at, and by discussing what they found it might imply how they're going about it. For that reason the military and intelligence agencies have a review process about how such data is released. Reality Winner took it upon herself to circumvent the usual rules, which is a violation of the law even if the report should have been released.
Think of it this way. There is a speed limit posted on the road where you travel. Should all motorists decide for themselves if that speed limit makes sense, and if they can break it with impunity? Or should they stick to the rules and (perhaps) write an agry letter to their congressman afterwards?