I see where the author is coming from. The author's main gripe is that non-factual right-wing stories are being presented as left-wing blindspots. The author would seemingly prefer that those stories be flagged as being untrustworthy due to low factuality scores among its sources. Understandable but I think it defeats the purpose of Ground News.

I think the idea is that if you are seeking the truth, and Ground News shows you a story that's being covered exclusively by right or left wing sources, that's their signal that the story could be either a) bullshit, or b) something one side is conveniently ignoring because it runs counter to their agenda. Ultimately it's up to you to you to decide. But, this way, if you hear this story being talked about elsewhere, you've now encountered it and know that it's being almost exclusively covered by one side.