I think you misunderstood the definition of ‘human universal’. Steven pinker’s Blank Slate has a list of human universals that are hard wired human habits irrespective of culture/age/gender/geography etc
The phrase occured only in the title and article and not in the comment they were responding too. It is possible they did not fully read the article(Most skim or read the title or title and abstract). In which case your response wasn't super helpful.