i thought it was Wilson who gave it weight by saying it proved all claims were not true
Wilson, actually, never said that the Bush Admin relied on the forged documents. In fact, Bush probably disregarded them given he mentioned British Intelligence. Both before and after Wilson's NYTImes op-ed the Brits denied their intel had anything to do with the forged documents, and they didn't even know about them when they made there assessment.
Wilson is generally careful to say that he proved that Niger could not have completed a sale of uranium, not that Iraq didn't seek it from them. It's a semantic game lost on the media.