On a darker note, one could almost see it as a form of mercy that none of the other species survived into the era of civilizations. Given our willingness to enslave other humans, I can only imagine what would have been done with "lesser" humans.
People who think that Neanderthals/etc were "lesser" humans (for whatever bogus reasons) probably also need to conclude (for the same reasons) that Europeans are also lesser humans
https://www.history.com/news/dna-study-finds-aboriginal-aust...
Of course, post-agriculture most humanity lives in (East and South) Asia, except in Cyrus' age where a third of humanity lives in West Asia and Eastern North Africa. Persia ruled 1/3rd of humanity then, the most out of any empire after that. Except perhaps China of some periods
See also the genetics of the San people here: https://en.wikipedia.org/wiki/San_people#Genetics
One of his observations was imagining what a disaster it would have been if this finding had gone the 'other' way.
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.
The strongest real inferiority argument is that we survived and they didn't. But if they/we are still here then that's right out the window.
Or they haven't at all. Consider that people of European and Asian ancestry typically share some Neanderthal DNA, and the DNA difference between humans and chimpanzees is ~1%. Maybe they're just us.