That's a pretty sanguine point of view. Russia stole emails from a private organization for the explicit intent of disrupting the election and then fed them to WikiLeaks and then Assange had audacity to try to blame Seth Rich. Julian Assange provably lies to further his personal agenda. Any good he has done for the world has been purely coincidental.
Cable news hire experts to give expert opinions. Not to divulge state secrets for personal gain.
Journalists report on leaks from intelligence all the time, to the point that the "Intelligence sources say"-phrase is becoming a meme of US "news".
You can't open CNN or MSNBC without seeing some FBI or CIA head telling you what they want you to think.
Why something is being leaked is relevant, but it shouldn't be a reason to ignore the truth or attack the journalist.