In what regard do you see dominance valued and looked up at. Sadism is "almost" never associated with anything positive? Give me an example of the exception?
You have a great question ...others here are seeking the same answers.
Maybe it similar to blood lust type activities ....watching dog fights ....cock fights .... one animal killing another for fun ...bull fights( in Spain)they end up killing the bull ritualistically slow ....cage fights "humans "