Why is Ground News relevant here?
There is some kernel of value to seeking out information from diverse sources. But groups like Ground News pervert that to mean that the left and right are on equally good terms with fact and reality (nevermind that collapsing politics and news media down to left and right is balderdash)
Notably, like another allegedly unbiased news source (RealClearPolitics and related), Ground News is run by conservatives. They know precisely how it works and are taking advantage of sensible people who think they must be getting biased news and want more exposure to the other side, with the intention of ratcheting the Overton window ever more to the right.
That does not necessarily imply giving equal airtime or equal legitimacy to the different sides at all.
Eh, to the extent that I care about it being "run by conservatives" it's only in whether it creates a distorted perception of reality. As someone with a very varied media diet I don't really find them to be distortive, so I don't really care whether the founders are conservative or not.