Just, appropriately to this thread, playing Devil’s Advocate here with you.
But say it is of evolutionary cause. Innate in the way that other species have common, universal traits such that humans nearly universally recognize the same components of morality. If it leads to a persistent consensus of what is moral behavior, why would that necessarily be lacking in authority?
Look at society today, it’s ‘moral changes’ in the last 50 years and you tell me. Let that answer your question.