Homo Sapiens did the bumpty-bump with Neanderthals and Denisovans whenever they rolled into town! They didn't fret over getting strange looks in restaurants or filling out census forms. Humans have sure as hell never let anything get in the way of gettin' on the way if they could help it. If there were any chicken-shit Homo Sapiens 50,000 years ago whining about 'the daaaangers of diveeeeersity' while everyone else was busy gettin' busy they were likely killed by the stronger specimens and/or eaten by carnivores. Just as well.