Except that sometimes, some of us do. I've had RSBD (REM Sleep Behavior Disorder) for most of my life. I'll jump out of bed to fight off imaginary intruders, sometimes chasing them through the house. I;ve never pummeled my wife, though of course my screams and and leaping out of bed upset her. Strangely, this has lessened with age, contrary to what health articles suggest.
Another odd thing I have experienced is called Exploding Head Syndrome (though mine has been more like my head is buzzing with electricity) . That's sleep related; Google it. I've only had it happen twice; it was not unpleasant and actually I found it interesting.