Poorly-aged tweet - in Who We Are and How We Got Here Robert Reich talks about the strong evidence for the existence of a "ghost population" that interbred only with the ancestors of modern sub-Saharan Africans. It's a ghost because we don't have any physical remains like we do with Neanderthals and Denisovans, but there is an ancient genetic signature that exists only in that population.
More generally - because people use motivated reasoning, you could just as easily spin the Neanderthal finding the opposite way. "Neanderthal ancestry is a secret superpower that makes Asian and European people special!" or whatever. Once you have your conclusion, you can spin the facts to fit your narrative.
One of his observations was imagining what a disaster it would have been if this finding had gone the 'other' way.