The reason freedom of the press exists is so that you don't have to rely on the goodwill of the government to "do the right thing" when you tell them you have found out what they are doing. WL is a legitimate press organization, they released the manning stuff at the same time as three well established and respected newspapers they partnered with, Guardian, NYT and Der Speigel. The news people did what WL did not have the resources and expertise to do, redacted the names of informants. The result - WL cops all the flack from the spooks, while the release and the role of the established newspapers is ignored.
Freedom of the press does not mean individual publishers have to apply for a license to publish.
Disclaimer: I don't like either Rupert Murdoch or Julian Assange steering the views of the public, they both have lousy personalities that I wouldn't associate with unless absolutely necessary, but they most certainly have a right to their freedoms, and not the least of those is the freedom of the press.