I don’t think that is true. The ‘median’ person has empathy and care, and would not hurt someone even if they could be totally undetected - but there is a large skew, which makes this true for the ‘mean’ person and thus ‘reality’, if that makes any sense.

As an example: a bowl of candy on Halloween with a “take 2 pieces only please” sign on it. Most people will only take 2. A few people will grab a handful. And one person will come along and take the whole bowl.