Wikileaks itself likes to say nothing they have published has been disputed as being incorrect. Since 2006 they have never published a retraction/correction and Wikileaks claims that no one has proven a factual inaccuracy in any of the documents they published. I don't know of any factual inaccuracies myself, but if you know of any I would be interested to hear about it. I think most can agree that this is uncommon in most media (mainstream or otherwise).
Another weaker argument is the incredible lengths various governments have gone to suppress Wikileaks. The demonization of Wikileaks (especially in the media) is sometimes cited as a reason to trust its publications. The argument goes that because Wikileaks is attacked by such powerful and arguably corrupt institutions that Wikileaks must be a perceived threat to these institutions. On its face, this argument is much weaker than the previous one. Censorship of InfoWars makes the comparison you made seem quite apt in this regard. Another counterargument to this point is that apparent opposition can be purely theatrical similar to professional wrestling. Lenin's quote on controlled opposition is appropriate in this context.