The whole "human nature" argument always irritates me. We deny human nature all the time, and if we didn't our world would be far worse. Human nature has many aspects that are bad. Like, really bad! Not all of it is bad, and our uniquely human privilege is the ability to use the good parts of our nature to control the bad parts. Saying that we should accept something "because it's here to stay" and that to do otherwise is "against nature" is like saying there's no point in standing up straight because gravity will always be pulling us down.